Cisco IOS IPv6 Type 0 Routing Header denial of service

cisco-ios-ipv6-header-dos (35906) The risk level is classified as MediumMedium Risk

Description:

Cisco IOS is vulnerable to a denial of service, caused by an error in the IPv6 implementation. By sending a specially-crafted IPv6 packet with a Type 0 Routing Header, a remote attacker could cause a vulnerable device to leak memory and possibly crash.

Platforms Affected:

  • Cisco, IOS 12.0S
  • Cisco, IOS 12.0ST
  • Cisco, IOS 12.0SX
  • Cisco, IOS 12.0SY
  • Cisco, IOS 12.0SZ
  • Cisco, IOS 12.1XU
  • Cisco, IOS 12.1XV
  • Cisco, IOS 12.1YB
  • Cisco, IOS 12.1YC
  • Cisco, IOS 12.1YD
  • Cisco, IOS 12.2B
  • Cisco, IOS 12.2BC
  • Cisco, IOS 12.2BW
  • Cisco, IOS 12.2BY
  • Cisco, IOS 12.2CX
  • Cisco, IOS 12.2DD
  • Cisco, IOS 12.2DX
  • Cisco, IOS 12.2EU
  • Cisco, IOS 12.2EW
  • Cisco, IOS 12.2EWA
  • Cisco, IOS 12.2EZ
  • Cisco, IOS 12.2FZ
  • Cisco, IOS 12.2MC
  • Cisco, IOS 12.2S
  • Cisco, IOS 12.2SEA
  • Cisco, IOS 12.2SEB
  • Cisco, IOS 12.2SEC
  • Cisco, IOS 12.2SED
  • Cisco, IOS 12.2SEE
  • Cisco, IOS 12.2SEG
  • Cisco, IOS 12.2SG
  • Cisco, IOS 12.2SU
  • Cisco, IOS 12.2SV
  • Cisco, IOS 12.2SW
  • Cisco, IOS 12.2SX
  • Cisco, IOS 12.2SXA
  • Cisco, IOS 12.2SXB
  • Cisco, IOS 12.2SXD
  • Cisco, IOS 12.2SY
  • Cisco, IOS 12.2SZ
  • Cisco, IOS 12.2T
  • Cisco, IOS 12.2TPC
  • Cisco, IOS 12.2XA
  • Cisco, IOS 12.2XB
  • Cisco, IOS 12.2XC
  • Cisco, IOS 12.2XD
  • Cisco, IOS 12.2XF
  • Cisco, IOS 12.2XG
  • Cisco, IOS 12.2XH
  • Cisco, IOS 12.2XI
  • Cisco, IOS 12.2XJ
  • Cisco, IOS 12.2XK
  • Cisco, IOS 12.2XL
  • Cisco, IOS 12.2XM
  • Cisco, IOS 12.2XN
  • Cisco, IOS 12.2XQ
  • Cisco, IOS 12.2XT
  • Cisco, IOS 12.2XU
  • Cisco, IOS 12.2XV
  • Cisco, IOS 12.2XW
  • Cisco, IOS 12.2YA
  • Cisco, IOS 12.2YB
  • Cisco, IOS 12.2YD
  • Cisco, IOS 12.2YE
  • Cisco, IOS 12.2YF
  • Cisco, IOS 12.2YH
  • Cisco, IOS 12.2YJ
  • Cisco, IOS 12.2YL
  • Cisco, IOS 12.2YM
  • Cisco, IOS 12.2YN
  • Cisco, IOS 12.2YQ
  • Cisco, IOS 12.2YR
  • Cisco, IOS 12.2YT
  • Cisco, IOS 12.2YU
  • Cisco, IOS 12.2YV
  • Cisco, IOS 12.2YW
  • Cisco, IOS 12.2YX
  • Cisco, IOS 12.2YY
  • Cisco, IOS 12.2YZ
  • Cisco, IOS 12.2ZA
  • Cisco, IOS 12.2ZB
  • Cisco, IOS 12.2ZD
  • Cisco, IOS 12.2ZE
  • Cisco, IOS 12.2ZF
  • Cisco, IOS 12.2ZH
  • Cisco, IOS 12.2ZJ
  • Cisco, IOS 12.2ZL
  • Cisco, IOS 12.2ZR
  • Cisco, IOS 12.3
  • Cisco, IOS 12.3B
  • Cisco, IOS 12.3BC
  • Cisco, IOS 12.3BW
  • Cisco, IOS 12.3T
  • Cisco, IOS 12.3XA
  • Cisco, IOS 12.3XB
  • Cisco, IOS 12.3XC
  • Cisco, IOS 12.3XD
  • Cisco, IOS 12.3XE
  • Cisco, IOS 12.3XF
  • Cisco, IOS 12.3XG
  • Cisco, IOS 12.3XH
  • Cisco, IOS 12.3XI
  • Cisco, IOS 12.3XJ
  • Cisco, IOS 12.3XK
  • Cisco, IOS 12.3XQ
  • Cisco, IOS 12.3XR
  • Cisco, IOS 12.3XS
  • Cisco, IOS 12.3XU
  • Cisco, IOS 12.3XW
  • Cisco, IOS 12.3YA
  • Cisco, IOS 12.3YD
  • Cisco, IOS 12.3YF
  • Cisco, IOS 12.3YG
  • Cisco, IOS 12.3YH
  • Cisco, IOS 12.3YI
  • Cisco, IOS 12.3YJ
  • Cisco, IOS 12.3YK
  • Cisco, IOS 12.3YZ
  • Cisco, IOS XR 3.2.3
  • Cisco, IOS XR 3.2.4
  • Cisco, IOS XR 3.2.6
  • Cisco, IOS XR 3.3.0
  • Cisco, IOS XR 3.3.1
  • Cisco, IOS XR 3.3.2
  • Cisco, IOS XR 3.3.3
  • Cisco, IOS XR 3.3.4
  • Cisco, IOS XR 3.4.0
  • Cisco, IOS XR 3.4.1

Remedy:

Refer to cisco-sa-20070808-IOS-IPv6-leak for patch, upgrade, or suggested workaround information. See References.

Consequences:

Denial of Service

References:

  • cisco-sa-20070808-IOS-IPv6-leak, Cisco Security Advisory: Cisco IOS Information Leakage Using IPv6 Routing Header at http://www.cisco.com/warp/public/707/cisco-sa-20070808-IOS-IPv6-leak.shtml.
  • CVE-2007-4285: Unspecified vulnerability in Cisco IOS and Cisco IOS XR 12.x up to 12.3, including some versions before 12.3(15) and 12.3(14)T, allows remote attackers to obtain sensitive information (partial packet contents) or cause a denial of service (router or component crash) via crafted IPv6 packets with a Type 0 routing header.
  • FrSIRT/ADV-2007-2819: Cisco IOS IPv6 Routing Header Processing Information Disclosure Vulnerability
  • SA26359: Cisco IOS IPv6 Routing Header Information Disclosure and Denial of Service
  • SECTRACK ID: 1018542: Cisco IOS May Disclose Potentially Sensitive Information in IPv6 Routing Headers

Reported:

Aug 08, 2007

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