Cisco IOS Data-link Switching (DLSw) denial of service

cisco-ios-dlsw-dos (41482) The risk level is classified as LowLow Risk

Description:

Cisco IOS is vulnerable to a denial of service, caused by an error when Data-link Switching (DLSw) is enabled. By sending a specially-crafted UDP or IP Protocol 91 packet, a remote attacker could cause a memory leak or cause the device to reload.

Platforms Affected:

  • Cisco, IOS 12.0
  • Cisco, IOS 12.0DA
  • Cisco, IOS 12.0DB
  • Cisco, IOS 12.0DC
  • Cisco, IOS 12.0S
  • Cisco, IOS 12.0T
  • Cisco, IOS 12.0W
  • Cisco, IOS 12.0WC
  • Cisco, IOS 12.0XA
  • Cisco, IOS 12.0XC
  • Cisco, IOS 12.0XD
  • Cisco, IOS 12.0XE
  • Cisco, IOS 12.0XG
  • Cisco, IOS 12.0XH
  • Cisco, IOS 12.0XI
  • Cisco, IOS 12.0XJ
  • Cisco, IOS 12.0XK
  • Cisco, IOS 12.0XN
  • Cisco, IOS 12.0XQ
  • Cisco, IOS 12.0XR
  • Cisco, IOS 12.1
  • Cisco, IOS 12.1AA
  • Cisco, IOS 12.1AY
  • Cisco, IOS 12.1DB
  • Cisco, IOS 12.1DC
  • Cisco, IOS 12.1EA
  • Cisco, IOS 12.1EC
  • Cisco, IOS 12.1EX
  • Cisco, IOS 12.1EZ
  • Cisco, IOS 12.1GA
  • Cisco, IOS 12.1GB
  • Cisco, IOS 12.1T
  • Cisco, IOS 12.1XA
  • Cisco, IOS 12.1XC
  • Cisco, IOS 12.1XD
  • Cisco, IOS 12.1XG
  • Cisco, IOS 12.1XH
  • Cisco, IOS 12.1XI
  • Cisco, IOS 12.1XJ
  • Cisco, IOS 12.1XM
  • Cisco, IOS 12.1XP
  • Cisco, IOS 12.1XQ
  • Cisco, IOS 12.1XS
  • Cisco, IOS 12.1XT
  • Cisco, IOS 12.1XV
  • Cisco, IOS 12.1XW
  • Cisco, IOS 12.1XX
  • Cisco, IOS 12.1XY
  • Cisco, IOS 12.1XZ
  • Cisco, IOS 12.1YA
  • Cisco, IOS 12.1YB
  • Cisco, IOS 12.1YD
  • Cisco, IOS 12.1YE
  • Cisco, IOS 12.1YI
  • Cisco, IOS 12.2
  • Cisco, IOS 12.2B
  • Cisco, IOS 12.2BW
  • Cisco, IOS 12.2BY
  • Cisco, IOS 12.2DD
  • Cisco, IOS 12.2DX
  • Cisco, IOS 12.2EX
  • Cisco, IOS 12.2IXA
  • Cisco, IOS 12.2IXB
  • Cisco, IOS 12.2IXC
  • Cisco, IOS 12.2IXD
  • Cisco, IOS 12.2IXE
  • Cisco, IOS 12.2SBC
  • 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 12.2SXE
  • Cisco, IOS 12.2SY
  • Cisco, IOS 12.2SZ
  • Cisco, IOS 12.2T
  • Cisco, IOS 12.2XA
  • Cisco, IOS 12.2XB
  • Cisco, IOS 12.2XC
  • Cisco, IOS 12.2XD
  • Cisco, IOS 12.2XG
  • Cisco, IOS 12.2XH
  • Cisco, IOS 12.2XJ
  • Cisco, IOS 12.2XK
  • Cisco, IOS 12.2XL
  • Cisco, IOS 12.2XM
  • 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 12.2YC
  • 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 12.2YO
  • 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 12.2ZG
  • Cisco, IOS 12.2ZH
  • Cisco, IOS 12.2ZJ
  • Cisco, IOS 12.2ZL
  • Cisco, IOS 12.2ZU
  • Cisco, IOS 12.3B
  • Cisco, IOS 12.3BW
  • Cisco, IOS 12.3JK
  • Cisco, IOS 12.3T
  • Cisco, IOS 12.3VA
  • Cisco, IOS 12.3XB
  • Cisco, IOS 12.3XD
  • Cisco, IOS 12.3XF
  • Cisco, IOS 12.3XG
  • Cisco, IOS 12.3XH
  • Cisco, IOS 12.3XJ
  • Cisco, IOS 12.3XK
  • Cisco, IOS 12.3XQ
  • Cisco, IOS 12.3XU
  • Cisco, IOS 12.3XW
  • Cisco, IOS 12.3YF
  • Cisco, IOS 12.3YH
  • Cisco, IOS 12.3YI
  • Cisco, IOS 12.3YJ
  • Cisco, IOS 12.3YK
  • Cisco, IOS 12.3YQ
  • Cisco, IOS 12.3YT
  • Cisco, IOS 12.3YU
  • Cisco, IOS 12.4SW
  • Cisco, IOS 12.4XA
  • Cisco, IOS 12.4XC
  • Cisco, IOS 12.4XJ
  • Cisco, IOS 12.4XK
  • Cisco, IOS 12.4XW

Remedy:

Refer to cisco-sa-20080326-dlsw for patch, upgrade or suggested workaround information. See References.

Consequences:

Denial of Service

References:

  • cisco-sa-20080326-dlsw, Cisco Security Advisory: Multiple DLSw Denial of Service Vulnerabilities in Cisco IOS at http://www.cisco.com/warp/public/707/cisco-sa-20080326-dlsw.shtml.
  • BID-28465: Cisco IOS Multiple DLSw Denial of Service Vulnerablities
  • CVE-2008-1152: The data-link switching (DLSw) component in Cisco IOS 12.0 through 12.4 allows remote attackers to cause a denial of service (device restart or memory consumption) via crafted (1) UDP port 2067 or (2) IP protocol 91 packets.
  • FrSIRT/ADV-2008-1006: Cisco IOS Denial of Service and Information Disclosure Vulnerabilities
  • SA29507: Cisco IOS Multiple Vulnerabilities
  • SECTRACK ID: 1019712: Cisco IOS Data-link Switching Bug Lets Remote Users Deny Service

Reported:

Mar 26, 2008

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