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Cisco Security Advisory: Cisco IOS Next Hop Resolution Protocol Vulnerability

Document ID: 91766


Advisory ID: cisco-sa-20070808-nhrp

http://www.cisco.com/warp/public/707/cisco-sa-20070808-nhrp.shtml

Revision 1.2

Last Updated 2008 April 25 1230 UTC (GMT)

For Public Release 2007 August 08 1600 UTC (GMT)


Summary

The Cisco Next Hop Resolution Protocol (NHRP) feature in Cisco IOS contains a vulnerability that can result in a restart of the device or possible remote code execution.

NHRP is a primary component of the Dynamic Multipoint Virtual Private Network (DMVPN) feature.

NHRP can operate in three ways: at the link layer (Layer 2), over Generic Routing Encapsulation (GRE) and multipoint GRE (mGRE) tunnels and directly on IP (IP protocol number 54). This vulnerability affects all three methods of operation.

NHRP is not enabled by default for Cisco IOS.

This vulnerability is addressed by Cisco bug IDs CSCin95836 ( registered customers only) for non-12.2 mainline releases and CSCsi23231 ( registered customers only) for 12.2 mainline releases.

This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20070808-nhrp.shtml.

Note: The August 08, 2007 publication includes four Security Advisories and one Security Response. The advisories all affect IOS, one additionally affects Cisco Unified Communications Manager as well. Each advisory lists the releases that correct the vulnerability described in the advisory, and the advisories also detail the releases that correct the vulnerabilities in all four advisories. Individual publication links are listed below:

Affected Products

Vulnerable Products

Cisco devices running IOS that are configured for NHRP functionality are affected. NHRP is also used in conjunction with the DMVPN feature.

Affected devices may have the following command in the running configuration:

ip nhrp network-id <ID>

After the above command is configured, simply removing the command from the running configuration is not sufficient to disable the NHRP service. Customers can check the output of the following command to see if the NHRP process is enabled:

router#show processes | include NHRP

  42 Mwe   F8B8CC           24         76     315 7836/12000  0 NHRP

If the preceding command displays the NHRP process, NHRP is running on the IOS device.

Customers who do not have NHRP configured but see the process in the process table can take the following action to eliminate their exposure:

Ensure that NHRP is not configured in the device's startup configuration and reload the device. After the device is restarted with NHRP removed from the configuration, the NHRP process will not be running.

Products Confirmed Not Vulnerable

  • Cisco devices that do not run Cisco IOS are not affected.
  • Cisco devices that are running Cisco IOS XR are not affected.

No other Cisco devices are known to be affected.

Details

NHRP is a standards-based protocol that is aimed at providing Layer 2 to Layer 3 resolution for Nonbroadcast Multiaccess networks (NBMA).

Network devices and hosts can use NHRP to discover the addresses of other devices connected to an NBMA network.

For more information on NHRP, see http://www.cisco.com/en/US/products/ps6350/products_configuration_guide_chapter09186a0080435815.html

NHRP is an open standard and the public RFC is on the web at:

http://www.rfc-editor.org/rfc/rfc2332.txt leavingcisco.com

NHRP has extended uses in DMVPNs, can be carried in GRE and mGRE tunnels or can be transported directly within IP datagrams as IP protocol number 54.

Workarounds are available for protecting routers from NHRP packets sent over GRE or mGRE tunnels or sent as NHRP directly in IP datagrams.

No workarounds exist for blocking Layer 2 NHRP packets. However, Layer 2 NHRP packets are not routable and must be sent by a Layer 2-adjacent device.

This vulnerability was addressed by two different bug IDs. A Cisco IOS release only needs to contain one of these bug fixes to be repaired for this vulnerablility. The bug IDs are CSCin95836 ( registered customers only) (for non-12.2 mainline releases) and CSCsi23231 ( registered customers only) (for 12.2 mainline releases).

Vulnerability Scoring Details

Cisco is providing scores for the vulnerability in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 1.0.

Cisco will provide a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks.

Cisco PSIRT will set the bias in all cases to normal. Customers are encouraged to apply the bias parameter when determining the environmental impact of a particular vulnerability.

CVSS is a standards based scoring method that conveys vulnerability severity and helps determine urgency and priority of response.

Cisco has provided a FAQ to answer additional questions regarding CVSS at

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html.

Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at

http://intellishield.cisco.com/security/alertmanager/cvss.

CSCin95836 - Buffer overflow in NHRP protocol ( registered customers only)

Calculate the environmental score of CSCin95836 leavingcisco.com

CVSS Base Score - 8

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Impact Bias

Remote

High

Not Required

Complete

Complete

Complete

Normal

CVSS Temporal Score - 6.3

Exploitability

Remediation Level

Report Confidence

Proof-of-Concept

Official-Fix

Confirmed

CSCsi23231 - Buffer overflow in NHRP protocol ( registered customers only)

Calculate the environmental score of CSCin23231 leavingcisco.com

CVSS Base Score - 8

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Impact Bias

Remote

High

Not Required

Complete

Complete

Complete

Normal

CVSS Temporal Score - 6.3

Exploitability

Remediation Level

Report Confidence

Proof-of-Concept

Official-Fix

Confirmed

Impact

Successful exploitation of the vulnerability may result in a restart of the device or remote code execution. Repeated exploitation may result in an extended denial of service (DoS) condition.

Software Versions and Fixes

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

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

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

For further information about how Cisco IOS is built, numbered and maintained, please see the following URL: http://www.cisco.com/warp/public/620/1.html.

Major Release

Availability of Repaired Releases

Affected 12.0-Based Release

First Fixed Release

Recommended Release

12.0

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0DA

Not Vulnerable

 

12.0DB

Not Vulnerable

 

12.0DC

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.0S

12.0(32)S8; available 21-Aug-07

12.0(32)S8; available 21-Aug-07

12.0SC

Vulnerable; first fixed in 12.3(17a)BC

12.3(17b)BC8

12.3(21a)BC3

12.0SL

Vulnerable; first fixed in 12.0(32)S8; available 21-Aug-07

12.0(32)S8; available 21-Aug-07

12.0SP

Vulnerable; first fixed in 12.0(32)S8 available 21-Aug-07

12.0(32)S8; available 21-Aug-07

12.0ST

Vulnerable; first fixed in 12.0(32)S8; available 21-Aug-07

12.0(32)S8; available 21-Aug-07

12.0SX

Vulnerable; first fixed in 12.0(32)S8; available 21-Aug-07

12.0(32)S8; available 21-Aug-07

12.0SY

12.0(32)SY4; available 21-Aug-07

12.0(32)SY4; available 21-Aug-07

12.0SZ

Vulnerable; first fixed in 12.0(32)S8; available 21-Aug-07

 

12.0T

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0W

Not Vulnerable

 

12.0WC

Not Vulnerable

 

12.0WT

Not Vulnerable

 

12.0XA

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XB

Not Vulnerable

 

12.0XC

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XD

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XE

Vulnerable; first fixed in 12.1(27b)E3; available 10-Aug-07

 

12.0XF

Not Vulnerable

 

12.0XG

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XH

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XI

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XJ

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XK

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XL

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XM

Not Vulnerable

 

12.0XN

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XQ

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XR

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.0XS

Not Vulnerable

 

12.0XV

Not Vulnerable

 

12.0XW

Not Vulnerable

 

Affected 12.1-Based Release

First Fixed Release

Recommended Release

12.1

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1AA

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1AX

Not Vulnerable

 

12.1AY

Not Vulnerable

 

12.1AZ

Not Vulnerable

 

12.1CX

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1DA

12.2(10)DA8

12.2(12)DA12

12.2(10)DA8

12.2(12)DA12

12.1DB

Not Vulnerable

 

12.1DC

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.1E

12.1(27b)E3; available 5-Mar-08

 

12.1EA

Not Vulnerable

 

12.1EB

Not Vulnerable

 

12.1EC

Vulnerable; first fixed in 12.3(17a)BC

12.3(17b)BC8

12.3(21a)BC3

12.1EO

Not Vulnerable

 

12.1EU

Vulnerable; first fixed in 12.2(25)EWA10

12.2(25)EWA10

12.1EV

Not Vulnerable

 

12.1EW

Vulnerable; first fixed in 12.2(25)EWA10

All Cat4K platforms:

12.2(25)EWA10

12.2(31)SGA3

12.2(37)SG1

12.2(40)SG; available Oct-07

12.1EX

Vulnerable; first fixed in 12.1(27b)E3; available 5-Mar-08

 

12.1EY

Not Vulnerable

 

12.1EZ

Vulnerable; first fixed in 12.1(27b)E3; available 5-Mar-08

 

12.1GA

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1GB

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1T

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XA

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XB

Not Vulnerable

 

12.1XC

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XD

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XE

Not Vulnerable

 

12.1XF

Not Vulnerable

 

12.1XG

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1XH

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XI

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XJ

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1XK

Not Vulnerable

 

12.1XL

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1XM

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1XN

Not Vulnerable

 

12.1XO

Not Vulnerable

 

12.1XP

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1XQ

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1XR

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1XS

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XT

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1XU

Not Vulnerable

 

12.1XV

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1XW

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XX

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XY

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1XZ

Vulnerable; first fixed in 12.2(46)

12.2(46a)

12.1YA

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1YB

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1YC

Not Vulnerable

 

12.1YD

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1YE

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1YF

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1YG

Not Vulnerable

 

12.1YH

Not Vulnerable

 

12.1YI

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.1YJ

Not Vulnerable

 

Affected 12.2-Based Release

First Fixed Release

Recommended Release

12.2

12.2(26c); available 14-Aug-07

12.2(27c); available 14-Aug-07

12.2(28d); available 14-Aug-07

12.2(29b); available 14-Aug-07

12.2(46)

12.2(46a)

12.2B

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2BC

Vulnerable; first fixed in 12.3(17a)BC

12.3(17b)BC8

12.3(21a)BC3

12.2BW

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2BY

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2BZ

Vulnerable; first fixed in 12.3(7)XI10a available 21-Aug-07

12.3(7)XI10a; available 21-Aug-07

12.2CX

Vulnerable; first fixed in 12.3(17a)BC

12.3(17b)BC8

12.3(21a)BC3

12.2CY

Vulnerable; first fixed in 12.3(17a)BC

12.3(17b)BC8

12.3(21a)BC3

12.2CZ

Not Vulnerable

 

12.2DA

12.2(10)DA8

12.2(12)DA12

12.2(10)DA8

12.2(12)DA12

12.2DD

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2DX

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2EU

Vulnerable; first fixed in 12.2(25)EWA10

All Cat4K platforms:

12.2(25)EWA10

12.2(31)SGA3

12.2(37)SG1

12.2(40)SG; available Oct-07

12.2EW

Vulnerable; first fixed in 12.2(25)EWA10

All Cat4K platforms:

12.2(25)EWA10

12.2(31)SGA3

12.2(37)SG1

12.2(40)SG; available Oct-07

12.2EWA

12.2(25)EWA10

All Cat4K platforms:

12.2(25)EWA10

12.2(31)SGA3

12.2(37)SG1

12.2(40)SG; available Oct-07

12.2EX

Not Vulnerable

 

12.2EY

Not Vulnerable

 

12.2EZ

Not Vulnerable

 

12.2FX

Not Vulnerable

 

12.2FY

Not Vulnerable

 

12.2FZ

Not Vulnerable

 

12.2IXA

Not Vulnerable

 

12.2IXB

Not Vulnerable

 

12.2IXC

Not Vulnerable

 

12.2IXD

Not Vulnerable

 

12.2IXE

Not Vulnerable

 

12.2JA

Not Vulnerable

 

12.2JK

Not Vulnerable

 

12.2MB

Vulnerable; first fixed in 12.2(25)SW11

12.2(25)SW11

12.2MC

12.2(15)MC2h

12.2(15)MC2j

12.2(15)MC2j

12.2S

12.2(14)S19

12.2(18)S13

12.2(20)S14

12.2(25)S13

12.2(25)S13

12.2(14)S19

12.2SB

12.2(28)SB9

12.2(31)SB6

12.2(28)SB9; available 15-Aug-07

12.2(31)SB6

12.2SBC

Vulnerable; first fixed in 12.2(31)SB6

12.2(28)SB9; available 15-Aug-07

12.2(31)SB6

12.2SE

Not Vulnerable

 

12.2SEA

Not Vulnerable

 

12.2SEB

Not Vulnerable

 

12.2SEC

Not Vulnerable

 

12.2SED

Not Vulnerable

 

12.2SEE

Not Vulnerable

 

12.2SEF

Not Vulnerable

 

12.2SEG

Not Vulnerable

 

12.2SG

12.2(25)SG2; available 13-Aug-07

12.2(31)SG2; available 13-Aug-07

12.2(37)SG1; available 13-Aug-07

12.2(40)SG; available 24-Oct-07

All Cat4K platforms:

12.2(25)SG2

12.2(37)SG1

12.2(31)SG2

12.2(40)SG; available Oct-07

12.2SGA

12.2(31)SGA3

12.2(31)SGA4; available 15-Oct-07

All Cat4K platforms:

12.2(31)SGA3

12.2(37)SG1

12.2(40)SG; available Oct-07

12.2SL

Not Vulnerable

 

12.2SM

12.2(29)SM2; available 22-Aug-07

12.2(29)SM2; available 10-Aug-07

12.2SO

Not Vulnerable

 

12.2SRA

Not Vulnerable

 

12.2SRB

Not Vulnerable

 

12.2SU

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2SV

12.2(29)SV4; available 14-Oct-07

12.2(29)SV4; available 14-Oct-07

12.2SVA

Not Vulnerable

 

12.2SVC

Not Vulnerable

 

12.2SW

12.2(25)SW11

12.2(25)SW11

12.2SX

Vulnerable; first fixed in 12.2(18)SXE4

 

12.2SXA

Vulnerable; first fixed in 12.2(18)SXE4

 

12.2SXB

Vulnerable; first fixed in 12.2(18)SXE4

12.2(18)SXF10

12.2SXD

Vulnerable; contact TAC

 

12.2SXE

12.2(18)SXE4

12.2(18)SXF10

12.2SXF

Not Vulnerable

 

12.2SXH

Not Vulnerable

 

12.2SY

Vulnerable; first fixed in 12.2(18)SXE4

 

12.2SZ

Vulnerable; first fixed in 12.2(25)S13

12.2(25)S13

12.2(14)S19

12.2T

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2TPC

12.2(8)TPC10c; available 17-Aug-07

12.2(8)TPC10c

12.2UZ

Vulnerable; first fixed in 12.2(31)SB6

12.2(28)SB9; available 15-Aug-07

12.2(31)SB6

12.2VZ

Vulnerable; first fixed in 12.2(31)SB6

12.2(28)SB9; available 15-Aug-07

12.2(31)SB6

12.2XA

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XB

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XC

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2XD

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XE

Not Vulnerable

 

12.2XF

Vulnerable; first fixed in 12.3(17a)BC

12.3(17b)BC8

12.3(21a)BC3

12.2XG

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XH

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XI

Not Vulnerable

 

12.2XJ

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XK

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XL

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XM

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XN

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XQ

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XR

12.3(2)JA3

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XS

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XT

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XU

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XV

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2XW

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2YA

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2YB

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2YC

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2YD

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YE

Vulnerable; first fixed in 12.2(25)S13

12.2(25)S13

12.2(14)S19

12.2YF

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2YG

Not Vulnerable

 

12.2YH

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2YJ

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2YK

Not Vulnerable

 

12.2YL

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YM

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YN

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YO

Not Vulnerable

 

12.2YP

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2YQ

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YR

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YS

Not Vulnerable

 

12.2YT

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2YU

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YV

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YW

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YX

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YY

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2YZ

Vulnerable; first fixed in 12.2(25)S13

12.2(25)S13

12.2(14)S19

12.2ZA

Vulnerable; first fixed in 12.2(18)SXE4

 

12.2ZB

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2ZC

Not Vulnerable

 

12.2ZD

Vulnerable; contact TAC

 

12.2ZE

Vulnerable; first fixed in 12.3(17a)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.2ZF

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2ZG

Vulnerable; contact TAC

12.3(2)XA6

12.3(8)YG6; available 16-Aug-07

12.2ZH

Vulnerable; contact TAC

12.2(13)ZH9

12.2ZJ

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.2ZL

Vulnerable, first fixed in 12.3(14)T5 for the Cisco 17xx;

first fixed in 12.4(1c) for the Cisco 3200;

first fixed in 12.3(7)XR7, available 13-Aug-07 for the ICS7750

 

12.2ZP

Not Vulnerable

 

12.2ZR

Vulnerable; contact TAC

 

12.2ZU

Not Vulnerable

 

12.2ZW

Not Vulnerable

 

12.2ZY

Not Vulnerable

 

Affected 12.3-Based Release

First Fixed Release

Recommended Release

12.3

12.3(17a)

12.3(18)

12.3(19)

12.3(20)

12.3(21)

12.3(22)

12.3(23)

12.3(23)

12.3(20a)

12.3(21b)

12.3(22a)

12.3(18a)

12.3(19a); available 16-Aug-07

12.3(17c); available 16-Aug-07

12.3B

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3BC

12.3(17a)BC

12.3(21)BC

12.3(17b)BC8

12.3(21a)BC3

12.3BW

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3EU

Not Vulnerable

 

12.3JA

Not Vulnerable

 

12.3JEA

Not Vulnerable

 

12.3JEB

Not Vulnerable

 

12.3JK

Not Vulnerable

 

12.3JL

Not Vulnerable

 

12.3JX

Not Vulnerable

 

12.3T

Limited platform support is available

12.3(11)T12; available 16-Aug-07

12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3TPC

12.3(4)TPC11b; available 17-Aug-07

12.3(4)TPC11b; available 17-Aug-07

12.3VA

Not Vulnerable

 

12.3XA

12.3(2)XA6

12.3(2)XA6

12.3XB

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3XC

12.3(2)XC5

12.3(2)XC5

12.3XD

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3XE

12.3(2)XE5; available 17-Aug-07

12.3(2)XE5

12.3XF

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3XG

Vulnerable; contact TAC

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3XH

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3XI

12.3(7)XI10a; available 21-Aug-07

12.3(7)XI10a; available 21-Aug-07

12.3XJ

Vulnerable; first fixed in 12.3(14)YX8

12.3(14)YX9; available 13-Aug-07

12.3XK

Vulnerable; first fixed in 12.3(14)T5

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3XQ

Vulnerable; first fixed in 12.4(1c)

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3XR

12.3(7)XR7; available 17-Aug-07

12.3(7)XR7; available 17-Aug-07

12.3XS

Vulnerable; first fixed in 12.4(1c)

12.4(12c)

12.4(3h)

12.4(5c)

12.4(8d); available 03-Sep-07

12.4(7f)

12.4(16)

12.4(10c)

12.4(13d)

12.3XU

Vulnerable; first fixed in 12.4(4)T