Cisco Security Advisory
Cisco IOS Software IPv6 Denial of Service Vulnerability
AV:N/AC:L/Au:N/C:N/I:N/A:C/E:F/RL:OF/RC:C
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Cisco IOS Software contains a vulnerability in the IP version 6 (IPv6) protocol stack implementation that could allow an unauthenticated, remote attacker to cause a reload of an affected device that has IPv6 operation enabled. The vulnerability is triggered when an affected device processes a malformed IPv6 packet.
Cisco has released software updates that address this vulnerability. There are no workarounds to mitigate this vulnerability.
This advisory is posted at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110928-ipv6.
Note: The September 28, 2011, Cisco IOS Software Security Advisory bundled publication includes ten Cisco Security Advisories. Nine of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses a vulnerability in Cisco Unified Communications Manager. Each advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all vulnerabilities in the September 2011 Bundled Publication.
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_sep11.html
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This vulnerability affects devices that are running Cisco IOS Software and configured for IPv6 operation. IPv6 is not enabled by default in Cisco IOS Software.
Vulnerable Products
Cisco devices that are running an affected version of Cisco IOS Software and configured for IPv6 operation are affected. A device that is running Cisco IOS Software and that has IPv6 enabled will show some interfaces with assigned IPv6 addresses when the show ipv6 interface brief command is executed.
The show ipv6 interface brief command will produce an error message if the running version of Cisco IOS Software does not support IPv6, or will not show any interfaces with IPv6 address if IPv6 is disabled. The system is not vulnerable in either of these scenarios.
Sample output of the show ipv6 interface brief command on a system that is configured for IPv6 operation follows:
router>show ipv6 interface brief FastEthernet0/0 [up/up] FE80::222:90FF:FEB0:1098 2001:DB8:2:93::3 200A:1::1 FastEthernet0/1 [up/up] FE80::222:90FF:FEB0:1099 2001:DB8:2:94::1 Serial0/0/0 [down/down] unassigned Serial0/0/0.4 [down/down] unassigned Serial0/0/0.5 [down/down] unassigned Serial0/0/0.6 [down/down] unassigned
Alternatively, the IPv6 protocol is enabled if the interface configuration command ipv6 address
or ipv6 enable is present in the configuration. Both may be present, which the vulnerable configuration in the following example shows: interface FastEthernet0/1 ipv6 address 2001:0DB8:C18:1::/64 eui-64 ! interface FastEthernet0/2 ipv6 enable
A device that is running Cisco IOS Software and has IPv6 enabled on a physical or logical interface is vulnerable even if ipv6 unicast-routing is globally disabled (that is, the device is not routing IPv6 packets). Administrators can use the show ipv6 interface brief command to determine whether IPv6 is enabled on any interface.
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 15.0(1)M1 with an installed image name of C3900-UNIVERSALK9-M:
Router> show version Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2009 by Cisco Systems, Inc. Compiled Wed 02-Dec-09 17:17 by prod_rel_team !--- output truncated
Additional information about Cisco IOS Software release naming conventions is available in the white paper Cisco IOS and NX-OS Software Reference Guide available at: http://www.cisco.com/web/about/security/intelligence/ios-ref.html.
Products Confirmed Not Vulnerable
Cisco IOS XR Software and Cisco IOS XE Software are not affected by this vulnerability.
No other Cisco products are currently known to be affected by this vulnerability.
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IPv6, which was designed by the Internet Engineering Task Force (IETF), is intended to replace the current version, IP Version 4 (IPv4).
A vulnerability exists when Cisco IOS Software processes IPv6 packets. An attacker can exploit this vulnerability by sending malformed IPv6 packets to physical or logical interfaces that are configured to process IPv6 traffic. Transit traffic cannot trigger this vulnerability. Exploitation could cause an affected system to reload.
This vulnerability is documented in Cisco bug ID CSCtj41194 (registered customers only) , and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-0944.
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There are no workarounds for this vulnerability if IPv6 configuration is required.
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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.
Cisco IOS Software
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 2011 Bundled 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
First Fixed Release for All Advisories in the September 2011 Bundled Publication
There are no affected 12.0 based releases
Affected 12.1-Based Releases
First Fixed Release
First Fixed Release for All Advisories in the September 2011 Bundled Publication
Not vulnerable
Vulnerable; First fixed in Release 12.2SXF
Affected 12.2-Based Releases
First Fixed Release
First Fixed Release for All Advisories in the September 2011 Bundled Publication
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.2SB
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.2SB
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Releases up to and including 12.2(20)EW4 are not vulnerable.
Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Not vulnerable
12.2(55)EX3
Not vulnerable
12.2(58)EY
Not vulnerable
Vulnerable; migrate to any release in 15.0SE
Not vulnerable
Vulnerable; First fixed in Release 12.2SE
Not vulnerable
Vulnerable; First fixed in Release 12.2EX
Not vulnerable
Vulnerable; First fixed in Release 12.2SE
Not vulnerable
Vulnerable; migrate to any release in 12.2IRG
Not vulnerable
Vulnerable; migrate to any release in 12.2IRG
Not vulnerable
Vulnerable; migrate to any release in 12.2IRG
Not vulnerable
Vulnerable; contact your support organization per the instructions in theObtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in theObtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; migrate to any release in 12.2IRG
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; contact your support organization per the instructions in theObtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Vulnerable; First fixed in Release 12.2SRD
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Releases prior to 12.2(30)S are vulnerable; Releases 12.2(30)S and later are not vulnerable. First fixed in Release 12.2SB
Not vulnerable
12.2(31)SB20
12.2(33)SB10
Not vulnerable
Vulnerable; First fixed in Release 12.2SB
Not vulnerable
Vulnerable; First fixed in Release 12.2SCC
Not vulnerable
Vulnerable; First fixed in Release 12.2SCC
Not vulnerable
12.2(33)SCC7
Not vulnerable
12.2(33)SCD6
Not vulnerable
12.2(33)SCE112.2(33)SCE2
Not vulnerable
Not vulnerable
Not vulnerable
12.2(55)SE312.2(58)SE
Not vulnerable
Vulnerable; First fixed in Release 12.2SE
Not vulnerable
Vulnerable; First fixed in Release 12.2SE
Not vulnerable
Vulnerable; First fixed in Release 12.2SE
Not vulnerable
Vulnerable; First fixed in Release 12.2SE
Not vulnerable
Vulnerable; First fixed in Release 12.2SE
Not vulnerable
Vulnerable; First fixed in Release 12.2SE
Not vulnerable
Releases prior to 12.2(25)SEG4 are vulnerable; Releases 12.2(25)SEG4 and later are not vulnerable. First fixed in Release 12.2EX
Not vulnerable
Releases prior to 12.2(53)SG4 are vulnerable; Releases 12.2(53)SG4 and later are not vulnerable.
Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Not vulnerable
Not vulnerable
Not vulnerable
12.2(50)SQ3
Not vulnerable
Vulnerable; First fixed in Release 12.2SRD
Not vulnerable
Vulnerable; First fixed in Release 12.2SRD
Not vulnerable
Vulnerable; First fixed in Release 12.2SRD
Not vulnerable
12.2(33)SRD6
Not vulnerable
12.2(33)SRE4
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Releases prior to 12.2(29a)SV are vulnerable; Releases 12.2(29a)SV and later are not vulnerable. Migrate to any release in 12.2SVD
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; First fixed in Release 12.2SXF
Not vulnerable
Vulnerable; First fixed in Release 12.2SXF
Not vulnerable
Vulnerable; First fixed in Release 12.2SXF
Not vulnerable
Vulnerable; First fixed in Release 12.2SXF
Not vulnerable
Vulnerable; First fixed in Release 12.2SXF
Not vulnerable
12.2(18)SXF17b
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
12.2(33)SXI6
Not vulnerable
12.2(33)SXJ1
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; First fixed in Release 12.2SB
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Releases prior to 12.2(54)XO are vulnerable; Releases 12.2(54)XO and later are not vulnerable.
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; First fixed in Release 12.2SXF
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.2SXH
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Affected 12.3-Based Releases
First Fixed Release
First Fixed Release for All Advisories in the September 2011 Bundled Publication
There are no affected 12.3 based releases
Affected 12.4-Based Releases
First Fixed Release
First Fixed Release for All Advisories in the September 2011 Bundled Publication
Not vulnerable
12.4(25f)
12.4(24)GC4
12.4(24)GC4
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; migrate to any release in 12.4JA
Releases up to and including 12.4(21a)JX are not vulnerable.
Not vulnerable
Not vulnerable
Not vulnerable
12.4(24)MD6 on 28-Oct-2011
Not vulnerable
12.4(24)MDA7
Not vulnerable
12.4(24)MDB3
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Not vulnerable
Only 12.4(24)T through 12.4(24)T4 are affected; first fixed in 12.4(24)T3c and 12.4(24)T5
12.4(24)T6
12.4(15)T16
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
12.4(2)XB12
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Not vulnerable
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Vulnerable; First fixed in Release 12.4T
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; fixed in 12.4(22)YE6 on 30-Sept-2011; 12.4(24)YE7 available on 17-Oct-2011
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Affected 15.0-Based Releases
First Fixed Release
First Fixed Release for All Advisories in the September 2011 Bundled Publication
15.0(1)M5
15.0(1)M7
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Cisco IOS XE devices: see Cisco IOS-XE Software Availability
15.0(1)S4
Cisco IOS XE devices: see Cisco IOS-XE Software Availability
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Not vulnerable
Cisco IOS XE devices: see Cisco IOS-XE Software Availability
Cisco IOS XE devices: see Cisco IOS-XE Software Availability
Vulnerable; First fixed in Release 15.1T
Vulnerable; First fixed in Release 15.1T
Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability
Cisco IOS XE devices: Please see Cisco IOS-XE Software Availability
Affected 15.1-Based Releases
First Fixed Release
First Fixed Release for All Advisories in the September 2011 Bundled Publication
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Vulnerable; First fixed in Release 15.1T
Not vulnerable
15.1(4)M2; Available on 30-SEP-11
Not vulnerable
Vulnerable; contact your support organization per the instructions in the Obtaining Fixed Software section of this advisory.
Not vulnerable
Cisco IOS XE devices: See Cisco IOS-XE Software Availability
15.1(2)S2
15.1(3)S
Cisco IOS XE devices: See Cisco IOS-XE Software Availability
15.1(1)T3
15.1(2)T3
15.1(3)T1
15.1(1)T4 on 09-DEC-2011
15.1(2)T4
15.1(3)T2
Vulnerable; First fixed in Release 15.1T
Vulnerable; First fixed in Release 15.1T
Affected 15.2-Based Releases
First Fixed Release
First Fixed Release for All Advisories in the September 2011 Bundled Publication
There are no affected 15.2 based releases
Cisco IOS XE Software
Cisco IOS XE Release
First Fixed Release
First Fixed Release for All Advisories in the September 2011 Bundled Publication
2.1.x
Not vulnerable
Vulnerable; migrate to 3.3.2S or later
2.2.x
Not vulnerable
Vulnerable; migrate to 3.3.2S or later
2.3.x
Not vulnerable
Vulnerable; migrate to 3.3.2S or later
2.4.x
Not vulnerable
Vulnerable; migrate to 3.3.2S or later
2.5.x
Not vulnerable
Vulnerable; migrate to 3.3.2S or later
2.6.x
Not vulnerable
Vulnerable; migrate to 3.3.2S or later
3.1.xS
Not vulnerable
Vulnerable; migrate to 3.3.2S or later
3.1.xSG
Not vulnerable
Vulnerable; migrate to 3.2.0SG or later
3.2.xS
Not vulnerable
Vulnerable; migrate to 3.3.2S or later
3.2.xSG
Not vulnerable
Not vulnerable
3.3.xS
Not vulnerable
3.3.2S
3.4.xS
Not vulnerable
Not vulnerable
For mapping of Cisco IOS XE to Cisco IOS releases, please refer to the Cisco IOS XE 2 Release Notes, Cisco IOS XE 3S Release Notes, and, Cisco IOS XE 3SG Release Notes, available at http://www.cisco.com/en/US/docs/ios/ios_xe/2/release/notes/rnasr21.html#wp2310700, http://www.cisco.com/en/US/docs/ios/ios_xe/3/release/notes/asr1k_rn_3s_sys_req.html#wp2999052 and http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/release/note/OL_24726.html#wp2570252 respectively.
Cisco IOS XR Software
Cisco IOS XR Software is not affected by any of the vulnerabilities in the September 2011 bundled publication.
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The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
This vulnerability was discovered by Cisco during internal testing.
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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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Revision 1.1
2011-September-30
Update IOS Software table bundled publication first fixed information.
Revision 1.0
2011-September-28
Initial public release.
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