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Cisco Security Advisory

Cisco IOS Software Tunnels Vulnerability

High
Advisory ID:
cisco-sa-20090923-tunnels
First Published:
2009 September 23 16:00 GMT
Version 1.3:
Final
Workarounds:
See below
CVE-2009-2872
CVE-2009-2873
CWE-399
CVSS Score:
Base 7.1, Temporal 5.9Click Icon to Copy Verbose Score
AV:N/AC:M/Au:N/C:N/I:N/A:C/E:F/RL:OF/RC:C
CVE-2009-2872
CVE-2009-2873
CWE-399

Summary

  • Cisco devices running affected versions of Cisco IOS Software are vulnerable to a denial of service (DoS) attack if configured for IP tunnels and Cisco Express Forwarding.

    Cisco has released software updates that address this vulnerability.

    This advisory is posted at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090923-tunnels.

    Note: The September 23, 2009, Cisco IOS Security Advisory bundled publication includes eleven Security Advisories. Ten of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses a vulnerability in Cisco Unified Communications Manager. Each advisory lists the releases that correct the vulnerability or vulnerabilities detailed in the advisory.

    Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Advisory Bundled Publication" at the following link:

    http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep09.html

Affected Products

  • Cisco devices are vulnerable when running an affected version of Cisco IOS Software and configured for Generic Routing Encapsulation (GRE), IPinIP, Generic Packet Tunneling in IPv6 or IPv6 over IP tunnels with Cisco Express Forwarding enabled. The Cisco IOS Point to Point Tunneling Protocol (PPTP) feature creates GRE tunnels that are transparent to the user. Therefore systems configured for PPTP are also vulnerable.

    The Cisco multicast Virtual Private Network (MVPN) feature also creates GRE tunnels that are transparent to the user, however MVPN configurations are not vulnerable, unless there are other tunnels that are configured explicitly.

    Vulnerable Products

    A Cisco IOS device that is explicitly configured for a tunnel will have a configuration similar to the following in the output of show running-config:

    interface tunnel0
 ip address [IP-address]
 tunnel source [Tunnel-Source]
 tunnel destination [Tunnel Destination]

    An alternative method to identify devices that are configured for tunnels is to use the show interfaces command. A sample output is provided below:

    Router#show interfaces | include Tunnel
Tunnel0 is up, line protocol is down
  Hardware is Tunnel
  [...]
  Tunnel protocol/transport GRE/IP

!-- output truncated

    A Cisco IOS device that is configured for Cisco Express Forwarding will display the forwarding table in the output of show ip cef output, as in the following example:

    Router#show ip cef
Prefix              Next Hop             Interface
0.0.0.0/0           10.48.64.1           Ethernet0/0
0.0.0.0/32          receive
....

    Cisco Express Forwarding is enabled by default in most Cisco IOS Software versions.

    To determine the Cisco IOS Software release that is running on a Cisco product, administrators can log in to the device and issue the show version command to display the system banner. The system banner confirms that the device is running Cisco IOS Software by displaying text similar to "Cisco Internetwork Operating System Software" or "Cisco IOS Software." The image name displays in parentheses, followed by "Version" and the Cisco IOS Software release name. Other Cisco devices do not have the show version command or may provide different output.

    The following example identifies a Cisco 7200 series device running Cisco IOS Software release 12.3(19) with an installed image name of C7200-JS-M:

    7200#show version 
Cisco Internetwork Operating System Software 
IOS (tm) 7200 Software (C7200-JS-M), Version 12.3(19), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2006 by cisco Systems, Inc.
Compiled Thu 11-May-06 22:37 by evmiller

!-- output truncated

    The following example identifies a Cisco 7300 series device running Cisco IOS Software release 12.3(22) with an installed image name of C7301-P-M:

    7301# show version 
Cisco Internetwork Operating System Software 
IOS (tm) 7301 Software (C7301-P-M), Version 12.3(22), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by cisco Systems, Inc.
Compiled Wed 24-Jan-07 20:26 by ccai

!-- output truncated

    Additional information about Cisco IOS Software release naming conventions is available in "White Paper: Cisco IOS Reference Guide" at the following link: http://www.cisco.com/warp/public/620/1.html.

    Products Confirmed Not Vulnerable

    Cisco IOS XR Software is not affected.

    Cisco IOS XE Software is not affected.

    IPsec and Dynamic Multipoint VPN (DMVPN) configurations that are protected by IPsec are not affected.

    MVPN configurations are not affected.

    Multiprotocol Label Switching (MPLS) Traffic Engineering (TE) tunnels are not affected.

    No other Cisco products are currently known to be affected by these vulnerabilities.

Details

  • A tunnel protocol encapsulates a wide variety of protocol packet types inside IP tunnels, creating a virtual point-to-point link between internetworking devices over an IP network.

    Cisco Express Forwarding is a Layer 3 IP switching technology. It improves network performance and scalability for networks with high and dynamic traffic patterns.

    Devices that are running Cisco IOS Software and configured for GRE, IPinIP, Generic Packet Tunneling in IPv6 or IPv6 over IP tunnels tunnels and Cisco Express Forwarding may reload upon switching a specially crafted malformed packets. Please note that using PPTP creates GRE tunnels that are transparent to the end user so devices configured for PPTP are vulnerable if they are configured on an affected software version. Using MVPN also creates GRE tunnels that are transparent to the end user. However MVPN configurations are not vulnerable.

    These vulnerabilities are addressed by the Cisco Bug IDs CSCsh97579 ( registered customers only) , CSCsq31776 ( registered customers only) and CSCsx70889 ( registered customers only) and have been assigned Common Vulnerabilities and Exposures (CVE) IDs CVE-2009-2872 and CVE-2009-2873.

Workarounds

  • Disabling Cisco Express Forwarding will mitigate this vulnerability. It can be disabled in two ways:

    Disabling Cisco Express Forwarding Globally

    Cisco Express Forwarding can be globally disabled by using the no ip cef and no ipv6 cef global configuration commands.

    Disabling Cisco Express Forwarding on Tunnel Interfaces

    Cisco Express Forwarding can also be disabled on individual tunnel interfaces. To be effective, it must be disabled on all tunnel interfaces configured on an affected device. Cisco Express Forwarding can be disabled on individual interfaces as shown in the following example:

    interface Tunnel [interface-ID]
  no ip route-cache cef
  no ipv6 cef

    Note: Disabling Cisco Express Forwarding may have significant performance impact and is not recommended.

    Additional mitigations that can be deployed on Cisco devices in the network are available in the Cisco Applied Mitigation Bulletin companion document for this advisory, which is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20090923-tunnels

Fixed Software

  • When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.

    In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.

    Each row of the Cisco IOS software table (below) names a Cisco IOS release train. If a given release train is vulnerable, then the earliest possible releases that contain the fix (along with the anticipated date of availability for each, if applicable) are listed in the "First Fixed Release" column of the table. The "Recommended Release" column indicates the releases which have fixes for all the published vulnerabilities at the time of this Advisory. A device running a release in the given train that is earlier than the release in a specific column (less than the First Fixed Release) is known to be vulnerable. Cisco recommends upgrading to a release equal to or later than the release in the "Recommended Releases" column of the table.

    Major Release

    Availability of Repaired Releases

    Affected 12.0-Based Releases

    First Fixed Release

    Recommended Release

    12.0

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0DA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0DB

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.0(1)DB are not vulnerable.

    12.4(25b)

    12.4(23b)

    12.0DC

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0S

    12.0(32)S14; Available on 25-SEP-2009

    12.0(33)S5

    12.0(33)S5

    12.0(32)S14; Available on 25-SEP-2009

    12.0SC

    Vulnerable; first fixed in 12.0S

    12.0(33)S5

    12.0(32)S14; Available on 25-SEP-2009

    12.0SL

    Vulnerable; first fixed in 12.0S

    12.0(33)S5

    12.0(32)S14; Available on 25-SEP-2009

    12.0SP

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0ST

    Vulnerable; first fixed in 12.0S

    12.0(33)S5

    12.0(32)S14; Available on 25-SEP-2009

    12.0SX

    Vulnerable; first fixed in 12.0S

    12.0(33)S5

    12.0(32)S14; Available on 25-SEP-2009

    12.0SY

    12.0(32)SY9a

    12.0(32)SY10; Available on 25-SEP-2009

    12.0(32)SY9a

    12.0(32)SY10; Available on 25-SEP-2009

    12.0SZ

    Vulnerable; first fixed in 12.0S

    12.0(33)S5

    12.0(32)S14; Available on 25-SEP-2009

    12.0T

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0W

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.0(16)W5(21c) are not vulnerable.

    12.4(25b)

    12.4(23b)

    12.0WC

    Releases prior to 12.0(5)WC3b are vulnerable, release 12.0(5)WC3b and later are not vulnerable

    12.0WT

    Not Vulnerable

    12.0XA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XB

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XC

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XD

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XE

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XF

    Not Vulnerable

    12.0XG

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XH

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XI

    Releases prior to 12.0(4)XI2 are vulnerable, release 12.0(4)XI2 and later are not vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XJ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XK

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XL

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XM

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XN

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XQ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XR

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.0(6)XR are not vulnerable.

    12.4(25b)

    12.4(23b)

    12.0XS

    Not Vulnerable

    12.0XT

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.0XV

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    Affected 12.1-Based Releases

    First Fixed Release

    Recommended Release

    12.1

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1AA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1AX

    Vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.1AY

    Releases up to and including 12.1(13)AY are not vulnerable.

    Releases 12.1(22)AY1 and later are not vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.1AZ

    Not Vulnerable

    12.1CX

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1DA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1DB

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1DC

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1E

    Vulnerable; first fixed in 12.2SXF

    12.2(18)SXF17; Available on 30-SEP-2009

    12.1EA

    Releases up to and including 12.1(4)EA1c are not vulnerable.

    Releases 12.1(22)EA11 and later are not vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.1EB

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.1EC

    Vulnerable; first fixed in 12.3BC

    12.2(33)SCB4

    12.3(21a)BC9

    12.1EO

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.1EU

    Vulnerable; first fixed in 12.2SG

    12.2(31)SGA11; Available on 04-DEC-2009

    12.2(50)SG4

    12.1EV

    Not Vulnerable

    12.1EW

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1EX

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1EY

    Releases up to and including 12.1(1)EY are not vulnerable.

    12.1EZ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1GA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1GB

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1T

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XB

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XC

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XD

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XE

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XF

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XG

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XH

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XI

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XJ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XL

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XM

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XP

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XQ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XR

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XS

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.1(1)XS are not vulnerable.

    12.4(25b)

    12.4(23b)

    12.1XT

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XU

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XV

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XW

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XX

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1XY

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.1(4)XY are not vulnerable.

    12.4(25b)

    12.4(23b)

    12.1XZ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1YA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1YB

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1YC

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1YD

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1YE

    Releases prior to 12.1(5)YE6 are vulnerable, release 12.1(5)YE6 and later are not vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1YF

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1YH

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.1YI

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.1YJ

    Not Vulnerable

    Affected 12.2-Based Releases

    First Fixed Release

    Recommended Release

    12.2

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2B

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2BC

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2BW

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2BX

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2BY

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2BZ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2CX

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2CY

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2CZ

    Vulnerable; first fixed in 12.2SB

    12.2(31)SB16

    12.2(33)SB7

    12.2DA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2DD

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2DX

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2EW

    Vulnerable; first fixed in 12.2SG

    12.2(31)SGA11; Available on 04-DEC-2009

    12.2(50)SG4

    12.2EWA

    Vulnerable; first fixed in 12.2SG

    12.2(31)SGA11; Available on 04-DEC-2009

    12.2(50)SG4

    12.2EX

    Vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2EY

    Releases prior to 12.2(46)EY are vulnerable, release 12.2(46)EY and later are not vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2EZ

    Vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2FX

    Not Vulnerable

    12.2FY

    Not Vulnerable

    12.2FZ

    Vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2IRA

    Vulnerable; first fixed in 12.2SRD

    12.2(33)SRD3

    12.2IRB

    Vulnerable; first fixed in 12.2SRD

    12.2(33)SRD3

    12.2IRC

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2IXA

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2IXB

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2IXC

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2IXD

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2IXE

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2IXF

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2IXG

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2IXH

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2JA

    Releases up to and including 12.2(13)JA4 are not vulnerable.

    12.2JK

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2MB

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2MC

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2S

    Vulnerable; first fixed in 12.2SB

    12.2(31)SB16

    12.2(33)SB7

    12.2SB

    12.2(31)SB16

    12.2(33)SB6

    12.2(28)SB14; Available on 20-OCT-2009

    12.2(33)SB7

    12.2SBC

    Vulnerable; first fixed in 12.2SB

    12.2(31)SB16

    12.2(33)SB7

    12.2SCA

    Vulnerable; first fixed in 12.2SCB

    12.2(33)SCB4

    12.2SCB

    12.2(33)SCB4

    12.2(33)SCB4

    12.2SE

    12.2(50)SE2

    12.2(52)SE; Available on 13-OCT-2009

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2SEA

    Vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2SEB

    Vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2SEC

    Vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2SED

    Vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2SEE

    Vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2SEF

    Releases prior to 12.2(25)SEF2 are vulnerable, release 12.2(25)SEF2 and later are not vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2SEG

    Releases prior to 12.2(25)SEG4 are vulnerable, release 12.2(25)SEG4 and later are not vulnerable; first fixed in 12.2SE

    12.2(50)SE3

    12.2(52)SE; Available on 13-OCT-2009

    12.2SG

    12.2(50)SG4

    12.2(53)SG

    12.2(50)SG4

    12.2SGA

    12.2(31)SGA11; Available on 04-DEC-2009

    12.2(31)SGA11; Available on 04-DEC-2009

    12.2SL

    Not Vulnerable

    12.2SM

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2SO

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2SQ

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2SRA

    Vulnerable; first fixed in 12.2SRD

    12.2(33)SRD3

    12.2SRB

    Vulnerable; first fixed in 12.2SRD

    12.2(33)SRD3

    12.2SRC

    12.2(33)SRC5; Available on 29-OCT-2009

    12.2(33)SRD3

    12.2SRD

    12.2(33)SRD2

    12.2(33)SRD3

    12.2STE

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2SU

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2SV

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2SVA

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2SVC

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2SVD

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2SVE

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2SW

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.2SX

    Vulnerable; first fixed in 12.2SXF

    12.2(18)SXF17; Available on 30-SEP-2009

    12.2SXA

    Vulnerable; first fixed in 12.2SXF

    12.2(18)SXF17; Available on 30-SEP-2009

    12.2SXB

    Vulnerable; first fixed in 12.2SXF

    12.2(18)SXF17; Available on 30-SEP-2009

    12.2SXD

    Vulnerable; first fixed in 12.2SXF

    12.2(18)SXF17; Available on 30-SEP-2009

    12.2SXE

    Vulnerable; first fixed in 12.2SXF

    12.2(18)SXF17; Available on 30-SEP-2009

    12.2SXF

    12.2(18)SXF17; Available on 30-SEP-2009

    Please see IOS Software Modularity Patch

    12.2(18)SXF17; Available on 30-SEP-2009

    12.2SXH

    12.2(33)SXH6; Available on 30-OCT-2009

    Please see IOS Software Modularity Patch

    12.2(33)SXH6; Available on 30-OCT-2009

    12.2SXI

    12.2(33)SXI2

    12.2(33)SXI2a

    12.2SY

    Vulnerable; first fixed in 12.2SB

    12.2(31)SB16

    12.2(33)SB7

    12.2SZ

    Vulnerable; first fixed in 12.2SB

    12.2(31)SB16

    12.2(33)SB7

    12.2T

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2TPC

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2XA

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.2(1)XA are not vulnerable.

    12.4(25b)

    12.4(23b)

    12.2XB

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XC

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XD

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XE

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XF

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XG

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XH

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XI

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XJ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XK

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XL

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XM

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XNA

    Not Vulnerable

    12.2XNB

    Not Vulnerable

    12.2XNC

    Not Vulnerable

    12.2XND

    Not Vulnerable

    12.2XO

    Vulnerable; first fixed in 12.2SG

    12.2(31)SGA11; Available on 04-DEC-2009

    12.2(50)SG4

    12.2XQ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XR

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XS

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XT

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XU

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XV

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2XW

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2YA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2YB

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YC

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YD

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YE

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YF

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YG

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YH

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YJ

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YK

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YL

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YM

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2YN

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YO

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YP

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.2(8)YP are not vulnerable.

    12.4(25b)

    12.4(23b)

    12.2YQ

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YR

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YS

    Not Vulnerable

    12.2YT

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YU

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YV

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YW

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YX

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YY

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2YZ

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2ZA

    Vulnerable; first fixed in 12.2SXF

    12.2(18)SXF17; Available on 30-SEP-2009

    12.2ZB

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2ZC

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2ZD

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2ZE

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2ZF

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2ZG

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2ZH

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.2ZJ

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2ZL

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2ZP

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2ZU

    Vulnerable; first fixed in 12.2SXH

    12.2(33)SXH6; Available on 30-OCT-2009

    12.2ZX

    Vulnerable; first fixed in 12.2SB

    12.2(31)SB16

    12.2(33)SB7

    12.2ZY

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.2ZYA

    12.2(18)ZYA2

    Affected 12.3-Based Releases

    First Fixed Release

    Recommended Release

    12.3

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3B

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3BC

    12.3(21a)BC9

    12.3(21a)BC9

    12.3BW

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3EU

    Not Vulnerable

    12.3JA

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.3JEA

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.3JEB

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.3JEC

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.3JK

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3JL

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.3JX

    Not Vulnerable

    12.3T

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3TPC

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.3VA

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3XA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XB

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.3XC

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XD

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XE

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XF

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.3XG

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XI

    Vulnerable; first fixed in 12.2SB

    12.2(31)SB16

    12.2(33)SB7

    12.3XJ

    Vulnerable; first fixed in 12.4XR

    12.4(15)XR7

    12.4(22)XR

    12.3XK

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XL

    Vulnerable; first fixed in 12.4T

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3XQ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XR

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XS

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XU

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3XW

    Vulnerable; first fixed in 12.4XR

    12.4(15)XR7

    12.4(22)XR

    12.3XX

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XY

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3XZ

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3YA

    Vulnerable; first fixed in 12.4

    12.4(25b)

    12.4(23b)

    12.3YD

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YF

    Vulnerable; first fixed in 12.4XR

    12.4(15)XR7

    12.4(22)XR

    12.3YG

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YH

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YI

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YJ

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YK

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YM

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YQ

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YS

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YT

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YU

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.3YX

    Vulnerable; first fixed in 12.4XR

    12.4(15)XR7

    12.4(22)XR

    12.3YZ

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.3ZA

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    Affected 12.4-Based Releases

    First Fixed Release

    Recommended Release

    12.4

    12.4(23b)

    12.4(25b)

    12.4(25b)

    12.4(23b)

    12.4GC

    Not Vulnerable

    12.4JA

    12.4(13d)JA

    12.4JDA

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4JDC

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4JDD

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4JK

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4JL

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4JMA

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4JMB

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4JX

    Vulnerable; first fixed in 12.4JA

    12.4MD

    12.4(11)MD9

    12.4(11)MD9

    12.4(15)MD3

    12.4(22)MD1

    12.4MDA

    12.4(22)MDA1

    12.4(22)MDA1

    12.4MR

    Releases prior to 12.4(19)MR3 are vulnerable, release 12.4(19)MR3 and later are not vulnerable

    12.4(19)MR3

    12.4SW

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T2

    12.4(24)T2;Available on 23-OCT-2009

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XA

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XB

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XC

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XD

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XE

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XF

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XG

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XJ

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XK

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XL

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4XM

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XN

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4XP

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4XQ

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XR

    12.4(22)XR

    12.4(15)XR6

    12.4(15)XR7

    12.4(22)XR

    12.4XT

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XV

    Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory

    12.4XW

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XY

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4XZ

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4YA

    Vulnerable; first fixed in 12.4T

    12.4(15)T10

    12.4(20)T4

    12.4(22)T3

    12.4(24)T2; Available on 23-OCT-2009

    12.4YB

    12.4(22)YB4

    12.4(22)YB4

    12.4YD

    12.4(22)YD1

    12.4(22)YD1

    12.4YE

    12.4(22)YE1

    12.4(22)YE1

    Cisco IOS Software Modularity - Maintenance Packs

    Customers who are using Cisco IOS Software Modularity can apply the respective maintenance packs. More information on Cisco IOS Software Modularity can be found at the following link: http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_bulletin0900aecd80313e15.html

    The Maintenance Packs listed below can be downloaded at http://www.cisco.com/go/pn

    Cisco IOS Software Modularity Maintenance Pack for 12.2SXF

    Cisco IOS Software Release

    Solution Maintenance Pack(MP)

    12.2(18)SXF14

    MP001

    12.2(18)SXF15

    MP001

    12.2(18)SXF16

    MP001

    Cisco IOS Software Modularity Maintenance Pack for 12.2SXH

    Cisco IOS Software Release

    Solution Maintenance Pack(MP)

    12.2(33)SXH5

    MP001

Exploitation and Public Announcements

  • The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.

    This vulnerability was found internally.

Cisco Security Vulnerability Policy

  • To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.

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URL

Revision History

  • Revision 1.3

    2009-Oct-19

    Updated ION software table.

    Revision 1.2

    2009-Oct-02

    Added the availability for 12.2(31)SGA11. Configuration commands in the Workarounds section have been clarified.

    Revision 1.1

    2009-Sept-30

    In the Workarounds section, configuration commands for disabling IPv6 CEF were added.

    Revision 1.0

    2009-Sept-23

    Initial public release

    Show Less

Cisco Security Vulnerability Policy

  • To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.

Subscribe to Cisco Security Notifications

Action Links for This Advisory

Related to This Advisory