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Cisco Security Advisory

Cisco IOS Software Authentication Proxy Vulnerability

High
Advisory ID:
cisco-sa-20090923-auth-proxy
First Published:
2009 September 23 16:00 GMT
Version 1.1:
Final
Workarounds:
See below
Cisco Bug IDs:
CSCsy15227
CVE-2009-2863
CWE-399
CVSS Score:
Base 7.1, Temporal 5.9Click Icon to Copy Verbose Score
AV:N/AC:M/Au:N/C:C/I:N/A:N/E:F/RL:OF/RC:C
CVE-2009-2863
CWE-399

Summary

  • Cisco IOS® Software configured with Authentication Proxy for HTTP(S), Web Authentication or the consent feature, contains a vulnerability that may allow an unauthenticated session to bypass the authentication proxy server or bypass the consent webpage.

    Cisco has released software updates that address this vulnerability.

    There are no workarounds that mitigate this vulnerability.

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

    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

  • Vulnerable Products

    Devices running affected versions of Cisco IOS Software and configured with Authentication Proxy for HTTP(S) or Web Authentication or the consent feature are vulnerable.

    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 product that is running Cisco IOS Software Release 12.3(26) with an installed image name of C2500-IS-L:

    Router#show version
 Cisco Internetwork Operating System Software
 IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2)
 Technical Support: http://www.cisco.com/techsupport
 Copyright ©) 1986-2008 by cisco Systems, Inc.
 Compiled Mon 17-Mar-08 14:39 by dchih

    The following example shows a product that is running Cisco IOS Software release 12.4(20)T with an image name of C1841-ADVENTERPRISEK9-M:

    Router#show version
Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright ©) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 10-Jul-08 20:25 by prod_rel_team

    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.

    To determine if your device is configured with either Authentication Proxy for HTTP(S), Web Authentication or the consent feature, log into the device and issue the show running-config command.

    The following example identifies firewall authentication proxy services using the ip auth-proxy under the proxy rule name example_auth_proxy_name:

    Router#show running-config


 !
 ! Set up the aaa new model to use the authentication proxy.
 !

 aaa authorization auth-proxy default group

 !
 ! Apply a name to the authentication proxy configuration rule.
 !

 ip auth-proxy name example_auth_proxy_name http

 !
 ! Apply the authentication proxy rule at an interface.
 !

 interface e0 
  ip auth-proxy example_auth_proxy_name

 !

    The following example identifies firewall authentication proxy services running for HTTP under the proxy rule name example_auth_proxy_name, using the ip admission commands. This is the same configuration as Web Authentication:

    Router#show running-config


 !
 ! Set up the aaa new model to use the authentication proxy.
 !

 aaa authorization auth-proxy default group

 !
 ! Apply a name to the authentication proxy configuration rule.
 !

 ip admission name example_auth_proxy_name proxy http inactivity-time 60

 !
 ! Apply the authentication proxy rule at an interface.
 !

 interface FastEthernet0/1
  ip admission example_auth_proxy_name

 !

    The following example identifies a device configured with the consent feature under the consent rule name example_consent_rule:

    Router#show running-config


 !
 ! Apply a name to the consent configuration rule.
 !

 ip admission name example_consent_rule consent

 !
 ! Apply the consent rule at an interface.
 !

 interface FastEthernet 0/0 
  ip admission consent-rule_rule

 !

    Products Confirmed Not Vulnerable

    The following products and features are not affected by this vulnerability:

    • Cisco IOS XR Software
    • Cisco IOS XE Software
    • Firewall Authentication Proxy for FTP and Telnet Sessions
    • Cisco IOS devices not configured with Authentication Proxy for HTTP(S) or the consent feature

    No other Cisco products are currently known to be affected by this vulnerability.

Details

  • The Cisco IOS Firewall authentication proxy feature allows network administrators to apply specific security policies on a per-user basis. With the authentication proxy feature, users can log in to the network or access the Internet via HTTP, and their specific access profiles are automatically retrieved and applied from a CiscoSecure ACS, or other RADIUS or TACACS+ authentication server. The user profiles are active only when there is active traffic from the authenticated users. Web Authentication feature leverages the underlying authentication proxy feature.

    The consent feature for Cisco IOS routers enables organizations to provide temporary Internet and corporate access to end users through their wired and wireless networks by presenting a consent webpage. The consent feature can be used with or without requesting a username and password, but still leverages the underlying authentication proxy feature.

    This vulnerability allows a session to be permitted without first being authenticated by the authentication proxy, or to be permitted without first acknowledging the consent webpage. At least one successfully authenticated session or accepted consent session must exist for the vulnerability to be exposed. When this occurs, the RADIUS or TACACS+ server will show subsequent users as authenticated, all with the same username as the initial connection if performing authentication, regardless of the authentication information provided by the user and whether it was defined on the AAA server, and regardless of whether the password was correct.

    This vulnerability is caused by a race condition in the code, and several conditions outside the control of a malicious user and must be met before this vulnerability could be exploited.

    For further information on Authentication Proxy for HTTP see the Cisco IOS Security Configuration Guide, Release 12.4 "Configuring Authentication Proxy" at the following link: http://www.cisco.com/en/US/docs/ios/security/configuration/guide/sec_cfg_authen_prxy_external_docbase_0900e4b1805afd05_4container_external_docbase_0900e4b1807b01d5.html

    For further information on Authentication Proxy for HTTPS see the Cisco IOS Security Configuration Guide, Release 12.4 "Firewall Support of HTTPS Authentication Proxy" at the following link: http://www.cisco.com/en/US/docs/ios/security/configuration/guide/sec_fwall_https_prxy_external_docbase_0900e4b1805afe18_4container_external_docbase_0900e4b1807b01d5.html

    For further information on the consent feature see the Cisco IOS Security Configuration Guide, Securing User Services, Release 12.2SR "Consent Feature for Cisco IOS Routers" at the following link: http://www.cisco.com/en/US/docs/ios/sec_user_services/configuration/guide/sec_cons_feat_rtrs_ps6922_TSD_Products_Configuration_Guide_Chapter.html

    For further information on the Web Authentication feature see the Catalyst 3750 Switch Software Configuration Guide, Release 12.2(50)SE "Configuring IEEE 802.1x Port-Based Authentication" at the following link: http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_50_se/configuration/guide/sw8021x.html#wp1401291

    This vulnerability is documented in the following Cisco Bug ID: CSCsy15227 ( registered customers only) and has been assigned the Common Vulnerabilities and Exposures (CVE) identifier CVE-2009-2863.

Workarounds

  • There are no workarounds for this vulnerability.

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 vulnerability 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

    Not Vulnerable

    12.0DA

    Not Vulnerable

    12.0DB

    Releases up to and including 12.0(4)DB are not vulnerable.

    Releases 12.0(7)DB and later are not vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.0DC

    Releases up to and including 12.0(3)DC1 are not vulnerable.

    Releases 12.0(7)DC and later are not vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.0S

    Not Vulnerable

    12.0SC

    Not Vulnerable

    12.0SL

    Not Vulnerable

    12.0SP

    Not Vulnerable

    12.0ST

    Not Vulnerable

    12.0SX

    Not Vulnerable

    12.0SY

    Not Vulnerable

    12.0SZ

    Not Vulnerable

    12.0T

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.0(4)T1 are not vulnerable.

    12.4(23b)

    12.4(25b)

    12.0W

    Not Vulnerable

    12.0WC

    Releases prior to 12.0(5)WC4 are vulnerable, release 12.0(5)WC4 and later are not vulnerable

    12.0WT

    Not Vulnerable

    12.0XA

    Not Vulnerable

    12.0XB

    Not Vulnerable

    12.0XC

    Not Vulnerable

    12.0XD

    Not Vulnerable

    12.0XE

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.0(5)XE are not vulnerable.

    12.4(23b)

    12.4(25b)

    12.0XF

    Not Vulnerable

    12.0XG

    Not Vulnerable

    12.0XH

    Not Vulnerable

    12.0XI

    Not Vulnerable

    12.0XJ

    Not Vulnerable

    12.0XK

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.0XL

    Not Vulnerable

    12.0XM

    Not Vulnerable

    12.0XN

    Not Vulnerable

    12.0XQ

    Not Vulnerable

    12.0XR

    Vulnerable; first fixed in 12.4

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

    12.4(23b)

    12.4(25b)

    12.0XS

    Not Vulnerable

    12.0XT

    Not Vulnerable

    12.0XV

    Not Vulnerable

    Affected 12.1-Based Releases

    First Fixed Release

    Recommended Release

    12.1

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1AA

    Not Vulnerable

    12.1AX

    Not Vulnerable

    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

    Not Vulnerable

    12.1DA

    Not Vulnerable

    12.1DB

    Releases up to and including 12.1(3)DB1 are not vulnerable.

    Releases 12.1(4)DB1 and later are not vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1DC

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

    Releases 12.1(4)DC2 and later are not vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1E

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

    12.1EA

    Releases up to and including 12.1(6)EA1a are not vulnerable.

    Releases 12.1(8)EA1c and later are not vulnerable; first fixed in 12.2SE

    12.2(50)SE3; Available on 13-OCT-2009

    12.1EB

    Not Vulnerable

    12.1EC

    Not Vulnerable

    12.1EO

    Not Vulnerable

    12.1EU

    Not Vulnerable

    12.1EV

    Not Vulnerable

    12.1EW

    Not Vulnerable

    12.1EX

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.1(2)EX are not vulnerable.

    12.4(23b)

    12.4(25b)

    12.1EY

    Not Vulnerable

    12.1EZ

    Not Vulnerable

    12.1GA

    Not Vulnerable

    12.1GB

    Not Vulnerable

    12.1T

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1XA

    Not Vulnerable

    12.1XB

    Not Vulnerable

    12.1XC

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1XD

    Not Vulnerable

    12.1XE

    Not Vulnerable

    12.1XF

    Not Vulnerable

    12.1XG

    Not Vulnerable

    12.1XH

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1XI

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1XJ

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1XL

    Releases prior to 12.1(3a)XL2 are vulnerable, release 12.1(3a)XL2 and later are not vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1XM

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1XP

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1XQ

    Not Vulnerable

    12.1XR

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1XS

    Not Vulnerable

    12.1XT

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.1(2)XT2 are not vulnerable.

    12.4(23b)

    12.4(25b)

    12.1XU

    Not Vulnerable

    12.1XV

    Not Vulnerable

    12.1XW

    Not Vulnerable

    12.1XX

    Not Vulnerable

    12.1XY

    Not Vulnerable

    12.1XZ

    Not Vulnerable

    12.1YA

    Not Vulnerable

    12.1YB

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.1(5)YB are not vulnerable.

    12.4(23b)

    12.4(25b)

    12.1YC

    Not Vulnerable

    12.1YD

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    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(23b)

    12.4(25b)

    12.1YF

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.1YH

    Not Vulnerable

    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(23b)

    12.4(25b)

    12.2B

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.2(2)B7 are not vulnerable.

    12.4(23b)

    12.4(25b)

    12.2BC

    Not Vulnerable

    12.2BW

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2BX

    Not Vulnerable

    12.2BY

    Not Vulnerable

    12.2BZ

    Not Vulnerable

    12.2CX

    Not Vulnerable

    12.2CY

    Not Vulnerable

    12.2CZ

    Vulnerable; migrate to any release in 12.2SB

    12.2(31)SB16

    12.2(33)SB7

    12.2DA

    Not Vulnerable

    12.2DD

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2DX

    Not Vulnerable

    12.2EW

    Not Vulnerable

    12.2EWA

    Not Vulnerable

    12.2EX

    Vulnerable; first fixed in 12.2SE

    Releases up to and including 12.2(37)EX are not vulnerable.

    12.2(50)SE3

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

    12.2EY

    Vulnerable; first fixed in 12.2SE

    Releases up to and including 12.2(25)EY4 are not vulnerable.

    12.2(50)SE3

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

    12.2EZ

    Not Vulnerable

    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

    Not Vulnerable

    12.2JK

    Not Vulnerable

    12.2MB

    Not Vulnerable

    12.2MC

    Not Vulnerable

    12.2S

    Note: Releases prior to 12.2(30)S are vulnerable, release 12.2(30)S and later are not vulnerable;

    12.2(31)SB16

    12.2(33)SB7

    12.2SB

    Not Vulnerable

    12.2SBC

    Note: Releases prior to 12.2(27)SBC3 are vulnerable, release 12.2(27)SBC3 and later are not vulnerable;

    12.2(31)SB16

    12.2(33)SB7

    12.2SCA

    Not Vulnerable

    12.2SCB

    Not Vulnerable

    12.2SE

    12.2(50)SE3

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

    12.2(50)SE3

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

    12.2SEA

    Not Vulnerable

    12.2SEB

    Not Vulnerable

    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)SG1; Available on 07-DEC-2009

    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

    Not Vulnerable

    12.2SO

    Not Vulnerable

    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)SRD2a

    12.2(33)SRD3

    12.2(33)SRD3

    12.2STE

    Not Vulnerable

    12.2SU

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2SV

    Not Vulnerable

    12.2SVA

    Not Vulnerable

    12.2SVC

    Not Vulnerable

    12.2SVD

    Not Vulnerable

    12.2SVE

    Not Vulnerable

    12.2SW

    Not Vulnerable

    12.2SX

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

    12.2SXA

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

    12.2SXB

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

    12.2SXD

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

    12.2SXE

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

    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

    12.2(33)SXI2a

    12.2SY

    Not Vulnerable

    12.2SZ

    Not Vulnerable

    12.2T

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    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(23b)

    12.4(25b)

    12.2XB

    Vulnerable; first fixed in 12.4

    Releases up to and including 12.2(2)XB1 are not vulnerable.

    12.4(23b)

    12.4(25b)

    12.2XC

    Not Vulnerable

    12.2XD

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2XE

    Not Vulnerable

    12.2XF

    Not Vulnerable

    12.2XG

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2XH

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2XI

    Not Vulnerable

    12.2XJ

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2XK

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2XL

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2XM

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    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

    12.2(50)SG4

    12.2XQ

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2XR

    Not Vulnerable

    12.2XS

    Not Vulnerable

    12.2XT

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2XU

    Not Vulnerable

    12.2XV

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2XW

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2YA

    Releases prior to 12.2(4)YA8 are vulnerable, release 12.2(4)YA8 and later are not vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    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

    Not Vulnerable

    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

    Not Vulnerable

    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

    Not Vulnerable

    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(23b)

    12.4(25b)

    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

    Not Vulnerable

    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

    Not Vulnerable

    12.2YU

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

    12.2YV

    Releases prior to 12.2(11)YV1 are vulnerable, release 12.2(11)YV1 and later are not vulnerable

    12.2YW

    Not Vulnerable

    12.2YX

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

    12.2YY

    Not Vulnerable

    12.2YZ

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

    12.2ZA

    Not Vulnerable

    12.2ZB

    Not Vulnerable

    12.2ZC

    Not Vulnerable

    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(23b)

    12.4(25b)

    12.2ZF

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2ZG

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.2ZH

    Releases prior to 12.2(13)ZH6 are vulnerable, release 12.2(13)ZH6 and later are not vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    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

    Not Vulnerable

    12.2ZU

    Vulnerable; first fixed in 12.2SXH

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

    12.2ZX

    Not Vulnerable

    12.2ZY

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

    12.2ZYA

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

    Affected 12.3-Based Releases

    First Fixed Release

    Recommended Release

    12.3

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.3B

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.3BC

    Not Vulnerable

    12.3BW

    Not Vulnerable

    12.3EU

    Not Vulnerable

    12.3JA

    Not Vulnerable

    12.3JEA

    Not Vulnerable

    12.3JEB

    Not Vulnerable

    12.3JEC

    Not Vulnerable

    12.3JK

    Releases up to and including 12.3(2)JK3 are not vulnerable.

    Releases 12.3(8)JK1 and later are not vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.3JL

    Not Vulnerable

    12.3JX

    Not Vulnerable

    12.3T

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    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(23b)

    12.4(25b)

    12.3XB

    Not Vulnerable

    12.3XC

    Releases prior to 12.3(2)XC4 are vulnerable, release 12.3(2)XC4 and later are not vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.3XD

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.3XE

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    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(23b)

    12.4(25b)

    12.3XI

    Not Vulnerable

    12.3XJ

    Not Vulnerable

    12.3XK

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    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(23b)

    12.4(25b)

    12.3XR

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.3XS

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.3XU

    Not Vulnerable

    12.3XW

    Not Vulnerable

    12.3XX

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    12.3XY

    Not Vulnerable

    12.3XZ

    Not Vulnerable

    12.3YA

    Vulnerable; first fixed in 12.4

    12.4(23b)

    12.4(25b)

    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

    Not Vulnerable

    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

    Not Vulnerable

    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

    Not Vulnerable

    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

    Not Vulnerable

    12.3YX

    Not Vulnerable

    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(23a)

    12.4(25a)

    12.4(23b)

    12.4(25b)

    12.4GC

    Not Vulnerable

    12.4JA

    Not Vulnerable

    12.4JDA

    Not Vulnerable

    12.4JDC

    Not Vulnerable

    12.4JDD

    Not Vulnerable

    12.4JK

    Not Vulnerable

    12.4JL

    Not Vulnerable

    12.4JMA

    Not Vulnerable

    12.4JMB

    Not Vulnerable

    12.4JX

    Not Vulnerable

    12.4MD

    Not Vulnerable

    12.4MDA

    Not Vulnerable

    12.4MR

    Releases prior to 12.4(19)MR1 are vulnerable, release 12.4(19)MR1 and later are not vulnerable

    12.4SW

    Not Vulnerable

    12.4T

    12.4(24)T1

    12.4(20)T3

    12.4(22)T2

    12.4(15)T9

    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

    Not Vulnerable

    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

    Not Vulnerable

    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

    Not Vulnerable

    12.4XM

    Not Vulnerable

    12.4XN

    Not Vulnerable

    12.4XP

    Not Vulnerable

    12.4XQ

    Not Vulnerable

    12.4XR

    Not Vulnerable

    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

    Not Vulnerable

    12.4YE

    Not Vulnerable

    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 discovered by Cisco during internal testing. The Cisco PSIRT is not aware of malicious exploitation of this vulnerability, although we are aware of some customers who have seen this vulnerability triggered within their infrastructures.

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

URL

Revision History

  • Revision 1.1

    2009-October-19

    Updated ION software table.

    Revision 1.0

    2009-September-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