Summary

• A vulnerability in the Internet Group Management Protocol (IGMP) version 3 implementation of Cisco IOS® Software and Cisco IOS XE Software allows a remote unauthenticated attacker to cause a reload of an affected device. Repeated attempts to exploit this vulnerability could result in a sustained denial of service (DoS) condition. Cisco has released free software updates that address this vulnerability.

  This advisory is posted at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-igmp.

  Note: The September 22, 2010, Cisco IOS Software Security Advisory bundled publication includes six Cisco Security Advisories. Five of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses vulnerabilities in Cisco Unified Communications Manager. Each advisory lists the releases that correct the vulnerability or vulnerabilities detailed in the advisory. The table at the following URL lists releases that correct all Cisco IOS Software vulnerabilities that have been published on September 22, 2010, or earlier:

  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-bundle

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

  http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep10.html

Affected Products

• Vulnerable Products

  The following products are affected by this vulnerability:

  • Cisco IOS Software
  • Cisco IOS XE Software
    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 12.4(20)T with an installed 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 (c) 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 and NX-OS Software Reference Guide.

  Products Confirmed Not Vulnerable

  No other Cisco products are currently known to be affected by this vulnerability. Cisco IOS XR Software is not affected by this vulnerability.

  The IGMP version 1, IGMP version 2, and IPv6 Multicast Listener Discovery protocol (MLD) features in Cisco IOS and Cisco IOS XE Software are not affected by this vulnerability.

Details

• Internet Group Management Protocol (IGMP) is the protocol used by hosts and adjacent routers to manage membership in IP multicast groups. The IGMP version 3 protocol permits source-specific multicast which allows hosts to specify the IP address of the multicast source.

  A malformed IGMP packet can cause a vulnerable device to reload. This vulnerability can only be exploited if the malformed IGMP packet is received on an interface that has been enabled for IGMP version 3 and Protocol Independent Multicast (PIM). The malformed IGMP packet destination address can be unicast, multicast, or broadcast and can be addressed to any IP address in the vulnerable device, including loopback addresses.

  To exploit this vulnerability, a malformed packet must be received on a vulnerable interface, but it can be addressed to any IP address on the vulnerable device.

  Transit traffic will not trigger this vulnerability.

  A vulnerable interface configuration requires the PIM mode of operation (sparse-dense, sparse, or dense) to be configured in addition to the ip igmp version 3 command. The three possible configurations that permit exploitation of this vulnerability are:

  
  !--- Interface configured for PIM sparse and IGMPv3
  
  
  interface GigabitEthernet0/0
   ip address 192.168.0.1 255.255.255.0
   ip pim sparse-mode
   ip igmp version 3
  
  
  !--- Interface configured for PIM sparse-dense and IGMPv3
  
  
  interface GigabitEthernet0/1
   ip address 192.168.1.1 255.255.255.0
   ip pim sparse-dense-mode
   ip igmp version 3
  
  
  !--- Interface configured for PIM dense and IGMPv3
  
  
  interface GigabitEthernet0/2
   ip address 192.168.2.1 255.255.255.0
   ip pim dense-mode
   ip igmp version 3
  

  The IGMP version 3 lite feature is unrelated to this vulnerability, in that the presence or absence of the ip igmp v3lite command on an interface does not change the vulnerable condition of that interface.

  The IP router alert option may or may not be present in packets attempting to exploit the vulnerability described in this document.

  This vulnerability is documented in Cisco bug ID CSCte14603 ( registered customers only) . This vulnerability has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-2830.

Workarounds

• Additional mitigations that can be deployed on Cisco devices within 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-20100922-igmp.

  IGMP version 2

  Customers who do not require the Source Specific Multicast (SSM) functionality can use IGMP version 2 as a workaround.

  interface GigabitEthernet0/0
   ip address 192.168.0.1 255.255.255.0
   ip pim sparse-mode
   ip igmp version 2

  Control Plane Policing

  A partial mitigation of the vulnerability described in this document is to block IGMP packets with an IP Time to Live (TTL) field value that is not equal to 1. RFC1054 , "Host Extensions for IP Multicasting" RFC2236 , "Internet Group Management Protocol Version 2", and RFC3376 , "Internet Group Management Protocol Version 3", indicate that every IGMP message is sent with an IP TTL of 1.

  CoPP may be configured on a device to protect the management and control planes, and minimize the risk and effectiveness of direct infrastructure attacks by explicitly permitting only authorized traffic sent to infrastructure devices in accordance with existing security policies and configurations. The following example can be adapted to your network. Drop of IGMP packets with unicast IP destination addresses can also be implemented with CoPP if the network is using all multicast applications that utilize only multicast group destination addresses for IGMP packets.

  
  !
  !-- The following access list is used
  !-- to determine what traffic needs to be dropped by a control plane
  !-- policy (the CoPP feature.) If the access list matches (permit),
  !-- then traffic will be dropped. If the access list does not
  !-- match (deny), then traffic will be processed by the router.
  !-- all IGMP packets with ttl different from 1 will be selected 
  !-- by this acl and the "drop" action will be applied in the
  !-- corresponding CoPP polisy
  !
  
  
  ip access-list extended IGMP-ACL
    permit igmp any any ttl neq 1
  
  
  
  !
  !-- Permit (Police or Drop)/Deny (Allow) all other Layer3 and Layer4
  !-- traffic in accordance with existing security policies and
  !-- configurations for traffic that is authorized to be sent
  !-- to infrastructure devices.
  !-- Create a class map for traffic that will be policed by
  !-- the CoPP feature.
  !
  
  
  class-map match-all drop-IGMP-class
    match access-group name IGMP-ACL
  
  
  !
  !-- Create a policy map that will be applied to the
  !-- Control Plane of the device, and add the "drop-tcp-traffic"
  !-- class map.
  !
  
  
  policy-map CoPP-policy
   class drop-IGMP-class
    drop
  
  
  !
  !-- Apply the policy map to the control plane of the
  !-- device.
  !
  
  
  control-plane
   service-policy input CoPP-policy

  Additional information on the configuration and use of the CoPP feature is available in the Control Plane Policing Implementation Best Practices.

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 following Cisco IOS Software table corresponds to a Cisco IOS Software train. If a particular train is vulnerable, the earliest releases that contain the fix are listed in the First Fixed Release For This Advisory column. The First Fixed Release for All Advisories in the September 2010 Bundle Publication column lists the earliest possible releases that correct all the published vulnerabilities in the Cisco IOS Software Security Advisory bundled publication. Cisco recommends upgrading to the latest available release, where possible.

  Major Release	Availability of Repaired Releases
  Affected 12.0-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  There are no affected 12.0 based releases
  Affected 12.1-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  There are no affected 12.1 based releases
  Affected 12.2-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  12.2	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2B	Not Vulnerable	Vulnerable; first fixed in 12.4T Releases up to and including 12.2(2)B7 are not vulnerable.
  12.2BC	Not Vulnerable	Not Vulnerable
  12.2BW	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2BX	Not Vulnerable	Vulnerable; first fixed in 12.2SB Releases up to and including 12.2(15)BX are not vulnerable.
  12.2BY	Not Vulnerable	Vulnerable; first fixed in 12.4T Releases up to and including 12.2(2)BY3 are not vulnerable.
  12.2BZ	Not Vulnerable	Not Vulnerable
  12.2CX	Not Vulnerable	Not Vulnerable
  12.2CY	Not Vulnerable	Not Vulnerable
  12.2CZ	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2DA	Not Vulnerable	Not Vulnerable
  12.2DD	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2DX	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2EW	Not Vulnerable	Not Vulnerable
  12.2EWA	Not Vulnerable	Not Vulnerable
  12.2EX	Not Vulnerable	Not Vulnerable
  12.2EY	Not Vulnerable	Not Vulnerable
  12.2EZ	Not Vulnerable	Not Vulnerable
  12.2FX	Not Vulnerable	Not Vulnerable
  12.2FY	Not Vulnerable	Not Vulnerable
  12.2FZ	Not Vulnerable	Not Vulnerable
  12.2IRA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IRB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IRC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IRD	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IRE	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXD	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXE	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXF	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXG	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2IXH	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2JA	Not Vulnerable	Not Vulnerable
  12.2JK	Not Vulnerable	Not Vulnerable
  12.2MB	Not Vulnerable	Not Vulnerable
  12.2MC	Not Vulnerable	Releases up to and including 12.2(15)MC1 are not vulnerable. Releases 12.2(15)MC2b and later are not vulnerable; first fixed in 12.4T
  12.2MRA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2MRB	Not Vulnerable	12.2(33)MRB2
  12.2S	Not Vulnerable	Releases prior to 12.2(30)S are vulnerable, release 12.2(30)S and later are not vulnerable
  12.2SB	Not Vulnerable	12.2(31)SB19; Releases prior to 12.2(33)SB5 are vulnerable, release 12.2(33)SB5 and later are not vulnerable
  12.2SBC	Not Vulnerable	Vulnerable; first fixed in 12.2SB
  12.2SCA	Not Vulnerable	Vulnerable; first fixed in 12.2SCB
  12.2SCB	Not Vulnerable	12.2(33)SCB9
  12.2SCC	Not Vulnerable	12.2(33)SCC5
  12.2SCD	Not Vulnerable	12.2(33)SCD3
  12.2SE	Not Vulnerable	Not Vulnerable
  12.2SEA	Not Vulnerable	Not Vulnerable
  12.2SEB	Not Vulnerable	Not Vulnerable
  12.2SEC	Not Vulnerable	Not Vulnerable
  12.2SED	Not Vulnerable	Not Vulnerable
  12.2SEE	Not Vulnerable	Not Vulnerable
  12.2SEF	Not Vulnerable	Not Vulnerable
  12.2SEG	Not Vulnerable	Not Vulnerable
  12.2SG	Not Vulnerable	Releases prior to 12.2(40)SG are vulnerable, release 12.2(40)SG and later are not vulnerable; migrate to any release in 12.2SGA
  12.2SGA	Not Vulnerable	Not Vulnerable
  12.2SL	Not Vulnerable	Not Vulnerable
  12.2SM	Not Vulnerable	Not Vulnerable
  12.2SO	Not Vulnerable	Not Vulnerable
  12.2SQ	Not Vulnerable	Not Vulnerable
  12.2SRA	Not Vulnerable	Releases prior to 12.2(33)SRA6 are vulnerable, release 12.2(33)SRA6 and later are not vulnerable
  12.2SRB	Not Vulnerable	Releases prior to 12.2(33)SRB1 are vulnerable, release 12.2(33)SRB1 and later are not vulnerable
  12.2SRC	Not Vulnerable	Not Vulnerable
  12.2SRD	Not Vulnerable	Not Vulnerable
  12.2SRE	12.2(33)SRE1	12.2(33)SRE1
  12.2STE	Not Vulnerable	Not Vulnerable
  12.2SU	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2SV	Not Vulnerable	Releases prior to 12.2(29b)SV1 are vulnerable, release 12.2(29b)SV1 and later are not vulnerable; migrate to any release in 12.2SVD
  12.2SVA	Not Vulnerable	Not Vulnerable
  12.2SVC	Not Vulnerable	Not Vulnerable
  12.2SVD	Not Vulnerable	Not Vulnerable
  12.2SVE	Not Vulnerable	Not Vulnerable
  12.2SW	Not Vulnerable	Releases up to and including 12.2(21)SW1 are not vulnerable. Releases 12.2(25)SW12 and later are not vulnerable; first fixed in 12.4T
  12.2SX	Not Vulnerable	Releases up to and including 12.2(14)SX2 are not vulnerable.
  12.2SXA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2SXB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2SXD	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2SXE	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2SXF	Not Vulnerable	Releases prior to 12.2(18)SXF11 are vulnerable, releases 12.2(18)SXF11 and later are not vulnerable
  12.2SXH	Not Vulnerable	Not Vulnerable
  12.2SXI	Not Vulnerable	Not Vulnerable
  12.2SY	Not Vulnerable	Not Vulnerable
  12.2SZ	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2T	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2TPC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2XA	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XB	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XC	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XD	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XE	Not Vulnerable	Not Vulnerable
  12.2XF	Not Vulnerable	Not Vulnerable
  12.2XG	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XH	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XI	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XJ	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XK	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XL	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XM	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XN	Not Vulnerable	Vulnerable; first fixed in 12.2SB
  12.2XNA	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XNB	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XNC	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XND	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XNE	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XNF	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
  12.2XO	Not Vulnerable	Not Vulnerable
  12.2XQ	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XR	Not Vulnerable	Not Vulnerable
  12.2XS	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XT	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XU	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XV	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2XW	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2YA	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2YB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YD	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YE	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YF	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YG	Not Vulnerable	Not Vulnerable
  12.2YH	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YJ	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YK	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YL	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YM	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2YN	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YO	Not Vulnerable	Not Vulnerable
  12.2YP	Not Vulnerable	Not Vulnerable
  12.2YQ	Not Vulnerable	Not Vulnerable
  12.2YR	Not Vulnerable	Not Vulnerable
  12.2YS	Not Vulnerable	Not Vulnerable
  12.2YT	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YU	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YV	Not Vulnerable	Releases prior to 12.2(11)YV1 are vulnerable, release 12.2(11)YV1 and later are not vulnerable
  12.2YW	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YX	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YY	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2YZ	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZA	Not Vulnerable	Not Vulnerable
  12.2ZB	Not Vulnerable	Releases up to and including 12.2(8)ZB are not vulnerable.
  12.2ZC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZD	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZE	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2ZF	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2ZG	Not Vulnerable	Not Vulnerable
  12.2ZH	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.2ZJ	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZL	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZP	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZU	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZX	Not Vulnerable	Not Vulnerable
  12.2ZY	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.2ZYA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  Affected 12.3-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  12.3	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3B	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3BC	Not Vulnerable	Not Vulnerable
  12.3BW	Not Vulnerable	Not Vulnerable
  12.3EU	Not Vulnerable	Not Vulnerable
  12.3JA	Not Vulnerable	Not Vulnerable
  12.3JEA	Not Vulnerable	Not Vulnerable
  12.3JEB	Not Vulnerable	Not Vulnerable
  12.3JEC	Not Vulnerable	Not Vulnerable
  12.3JED	Not Vulnerable	Not Vulnerable
  12.3JK	Not Vulnerable	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 12.4T
  12.3JL	Not Vulnerable	Not Vulnerable
  12.3JX	Not Vulnerable	Not Vulnerable
  12.3T	Vulnerable; first fixed in 12.4 Releases up to and including 12.3(11)T11 are not vulnerable.	Vulnerable; first fixed in 12.4T
  12.3TPC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.3VA	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XA	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.3XC	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XD	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XE	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XF	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.3XG	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XI	Not Vulnerable	Releases prior to 12.3(7)XI11 are vulnerable, release 12.3(7)XI11 and later are not vulnerable; first fixed in 12.2SB
  12.3XJ	Not Vulnerable	Vulnerable; first fixed in 12.4XR
  12.3XK	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XL	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XQ	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XR	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XS	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XU	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XW	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XX	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XY	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3XZ	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YA	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YD	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YF	Not Vulnerable	Vulnerable; first fixed in 12.4XR
  12.3YG	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YH	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YI	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YJ	Not Vulnerable	Vulnerable; first fixed in 12.4T
  12.3YK	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YM	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YQ	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YS	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YT	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YU	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.3YX	12.3(14)YX17	Vulnerable; first fixed in 12.4XR
  12.3YZ	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.3ZA	Not Vulnerable	Vulnerable; first fixed in 12.4T
  Affected 12.4-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  12.4	12.4(25d)	12.4(25d)
  12.4GC	12.4(24)GC2	12.4(24)GC2
  12.4JA	Not Vulnerable	Not Vulnerable
  12.4JDA	Not Vulnerable	Not Vulnerable
  12.4JDC	Not Vulnerable	Not Vulnerable
  12.4JDD	Not Vulnerable	Not Vulnerable
  12.4JHA	Not Vulnerable	Not Vulnerable
  12.4JHB	Not Vulnerable	Not Vulnerable
  12.4JK	Not Vulnerable	Not Vulnerable
  12.4JL	Not Vulnerable	Not Vulnerable
  12.4JMA	Not Vulnerable	Not Vulnerable
  12.4JMB	Not Vulnerable	Not Vulnerable
  12.4JX	Not Vulnerable	Not Vulnerable
  12.4JY	Not Vulnerable	Not Vulnerable
  12.4MD	12.4(24)MD2	12.4(24)MD2
  12.4MDA	12.4(24)MDA1 12.4(22)MDA4	12.4(22)MDA4
  12.4MR	Vulnerable; first fixed in 12.4MRA	Vulnerable; first fixed in 12.4MRA
  12.4MRA	12.4(20)MRA1	12.4(20)MRA1
  12.4SW	Releases prior to 12.4(15)SW6 are vulnerable, release 12.4(15)SW6 and later are not vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4T	12.4(24)T3 12.4(22)T5 12.4(20)T5 12.4(15)T14	12.4(15)T14 12.4(20)T6 12.4(24)T4
  12.4XA	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XB	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XC	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XD	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XE	Releases prior to 12.4(6)XE5 are vulnerable, release 12.4(6)XE5 and later are not vulnerable; first fixed in 12.4T	Releases prior to 12.4(6)XE5 are vulnerable, release 12.4(6)XE5 and later are not vulnerable; first fixed in 12.4T
  12.4XF	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XG	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XJ	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XK	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XL	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4XM	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XN	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	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	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4XQ	12.4(15)XQ6; Available on 22-SEP-10	12.4(15)XQ6; Available on 22-SEP-10
  12.4XR	12.4(15)XR9 12.4(22)XR7	12.4(15)XR9 12.4(22)XR7
  12.4XT	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XV	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4XW	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XY	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4XZ	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4YA	Vulnerable; first fixed in 12.4T	Vulnerable; first fixed in 12.4T
  12.4YB	12.4(22)YB6	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4YD	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
  12.4YE	12.4(24)YE1 12.4(22)YE4	12.4(24)YE1
  12.4YG	12.4(24)YG3	12.4(24)YG3
  Affected 15.0-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  15.0M	15.0(1)M2	15.0(1)M3
  15.0S	Cisco 7600 and 10000 Series routers: Not vulnerable Cisco ASR 1000 Series routes: Please see Cisco IOS-XE Software Availability	Cisco 7600 and 10000 Series routers: 15.0(1)S1 (Available early October 2010) Cisco ASR 1000 Series routes: Please see Cisco IOS-XE Software Availability
  15.0XA	Vulnerable; migrate to any release in 15.1T	Vulnerable; first fixed in 15.1T
  15.0XO	Not Vulnerable	Not Vulnerable
  Affected 15.1-Based Releases	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  There are no affected 15.1 based releases

  Cisco IOS XE Software

  Cisco IOS XE Release	First Fixed Release for This Advisory	First Fixed Release for All Advisories in the September 2010 Bundle Publication
  2.1.x	Not Vulnerable	Not Vulnerable
  2.2.x	Not Vulnerable	Not Vulnerable
  2.3.x	Not Vulnerable	Not Vulnerable
  2.4.x	Not Vulnerable	Not Vulnerable
  2.5.x	2.5.2	Vulnerable; migrate to 2.6.2 or later
  2.6.x	Not Vulnerable	2.6.2
  3.1.xS	Not Vulnerable	Not Vulnerable

  To map Cisco IOS XE Software releases to Cisco IOS Software releases, refer to the Cisco IOS XE 2 and Cisco IOS XE 3S Release Notes.

  Cisco IOS XR Software Table

  Cisco IOS XR Software is not affected by the vulnerabilities disclosed in the September 22, 2010, Cisco IOS Software Security Advisory bundle publication.

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 reported to Cisco by a customer.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-igmp

Revision History

• Revision 1.0

  2010-Sep-22

  Initial public release.

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