Cisco IOS IPv4 packet denial of service

cisco-ios-ipv4-dos (12631)

High Risk

Description:

Multiple Cisco routers and switches are vulnerable to a denial of service attack. By default, Cisco IOS is enabled to process IPv4 packets. By sending a sequence of specially-crafted IPv4 packets, a remote attacker can cause the device to flag the input queue as being full, which causes the input interface to stop processing traffic. The device must be rebooted to regain normal functionality.

Consequences:

Denial of Service

Remedy:

For Virtual Patch:

Enable the following checks in the ISS Protection Platform:
Cisco_IOS_IPV4_DoS

For Manual Protection:

Upgrade to one of the fixed versions of Cisco IOS, as listed in Cisco Security Advisory dated 2003 July 17 at 6:10 UTC (GMT). Contact Cisco Technical Support for information on obtaining an upgrade. See References.

References:

• CERT Advisory CA-2003-15: Cisco IOS Interface Blocked by IPv4 Packet.
• CERT Advisory CA-2003-17: Exploit available for the Cisco IOS Interface Blocked Vulnerabilities.
• CIAC Information Bulletin N-118: Cisco IOS Interface Blocked by IPv4 Packet.
• Cisco Systems Inc. Security Advisory, 2003 July 17 at 6:10 UTC (GMT): Cisco IOS Interface Blocked by IPv4 Packet.
• Internet Security Systems Security Alert, July 17, 2003: Cisco IOS Remote Denial of Service Vulnerability.
• BID-8211: Cisco IOS Malicious IPV4 Packet Sequence Denial Of Service Vulnerability
• CVE-2003-0567: Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.
• US-CERT VU#411332: Cisco IOS Interface Blocked by IPv4 Packet

Platforms Affected:

• Cisco IOS 11.0
• Cisco IOS 11.1
• Cisco IOS 11.1AA
• Cisco IOS 11.1CA
• Cisco IOS 11.1CC
• Cisco IOS 11.2
• Cisco IOS 11.2P
• Cisco IOS 11.2SA
• Cisco IOS 11.3
• Cisco IOS 11.3T
• Cisco IOS 12.0
• Cisco IOS 12.0DA
• Cisco IOS 12.0DB
• Cisco IOS 12.0DC
• Cisco IOS 12.0S
• Cisco IOS 12.0SC
• Cisco IOS 12.0SL
• Cisco IOS 12.0SP
• Cisco IOS 12.0ST
• Cisco IOS 12.0SX
• Cisco IOS 12.0SY
• Cisco IOS 12.0SZ
• Cisco IOS 12.0T
• Cisco IOS 12.0W5
• Cisco IOS 12.0WC
• Cisco IOS 12.0WT
• Cisco IOS 12.0XA
• Cisco IOS 12.0XB
• Cisco IOS 12.0XC
• Cisco IOS 12.0XD
• Cisco IOS 12.0XE
• Cisco IOS 12.0XF
• Cisco IOS 12.0XG
• Cisco IOS 12.0XH
• Cisco IOS 12.0XI
• Cisco IOS 12.0XJ
• Cisco IOS 12.0XK
• Cisco IOS 12.0XL
• Cisco IOS 12.0XM
• Cisco IOS 12.0XN
• Cisco IOS 12.0XP
• Cisco IOS 12.0XQ
• Cisco IOS 12.0XR
• Cisco IOS 12.0XS
• Cisco IOS 12.0XU
• Cisco IOS 12.0XV
• Cisco IOS 12.0XW
• Cisco IOS 12.1
• Cisco IOS 12.1AA
• Cisco IOS 12.1AX
• Cisco IOS 12.1AY
• Cisco IOS 12.1DA
• Cisco IOS 12.1DB
• Cisco IOS 12.1DC
• Cisco IOS 12.1E
• Cisco IOS 12.1EA
• Cisco IOS 12.1EB
• Cisco IOS 12.1EC
• Cisco IOS 12.1EV
• Cisco IOS 12.1EW
• Cisco IOS 12.1EX
• Cisco IOS 12.1EY
• Cisco IOS 12.1M
• Cisco IOS 12.1T
• Cisco IOS 12.1XA
• Cisco IOS 12.1XB
• Cisco IOS 12.1XC
• Cisco IOS 12.1XD
• Cisco IOS 12.1XE
• Cisco IOS 12.1XF
• Cisco IOS 12.1XG
• Cisco IOS 12.1XH
• Cisco IOS 12.1XI
• Cisco IOS 12.1XJ
• Cisco IOS 12.1XK
• Cisco IOS 12.1XL
• Cisco IOS 12.1XM
• Cisco IOS 12.1XP
• Cisco IOS 12.1XQ
• Cisco IOS 12.1XR
• Cisco IOS 12.1XS
• Cisco IOS 12.1XT
• Cisco IOS 12.1XU
• Cisco IOS 12.1XV
• Cisco IOS 12.1XW
• Cisco IOS 12.1XX
• Cisco IOS 12.1XY
• Cisco IOS 12.1XZ
• Cisco IOS 12.1YB
• Cisco IOS 12.1YC
• Cisco IOS 12.1YD
• Cisco IOS 12.1YE
• Cisco IOS 12.1YF
• Cisco IOS 12.1YH
• Cisco IOS 12.1YI
• Cisco IOS 12.1YJ
• Cisco IOS 12.2
• Cisco IOS 12.2B
• Cisco IOS 12.2BC
• Cisco IOS 12.2BW
• Cisco IOS 12.2BX
• Cisco IOS 12.2BZ
• Cisco IOS 12.2CX
• Cisco IOS 12.2CY
• Cisco IOS 12.2DA
• Cisco IOS 12.2DD
• Cisco IOS 12.2DX
• Cisco IOS 12.2JA
• Cisco IOS 12.2MB
• Cisco IOS 12.2MC
• Cisco IOS 12.2MX
• Cisco IOS 12.2S
• Cisco IOS 12.2SX
• Cisco IOS 12.2SY
• Cisco IOS 12.2SZ
• Cisco IOS 12.2T
• Cisco IOS 12.2X
• Cisco IOS 12.2XA
• Cisco IOS 12.2XB
• Cisco IOS 12.2XC
• Cisco IOS 12.2XD
• Cisco IOS 12.2XE
• 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 12.2XR
• Cisco IOS 12.2XS
• Cisco IOS 12.2XT
• Cisco IOS 12.2XW
• Cisco IOS 12.2YA
• Cisco IOS 12.2YB
• Cisco IOS 12.2YC
• Cisco IOS 12.2YD
• Cisco IOS 12.2YF
• Cisco IOS 12.2YG
• Cisco IOS 12.2YH
• Cisco IOS 12.2YJ
• Cisco IOS 12.2YK
• Cisco IOS 12.2YL
• Cisco IOS 12.2YM
• Cisco IOS 12.2YN
• Cisco IOS 12.2YO
• Cisco IOS 12.2YP
• Cisco IOS 12.2YQ
• Cisco IOS 12.2YR
• Cisco IOS 12.2YS
• 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 12.2ZC
• 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 ONS 15454 Optical Transport Platform 3.0
• Cisco ONS 15454 Optical Transport Platform 3.1.0
• Cisco ONS 15454 Optical Transport Platform 3.2.0
• Cisco ONS 15454 Optical Transport Platform 3.3
• Cisco ONS 15454 Optical Transport Platform 3.4
• Cisco ONS 15454 Optical Transport Platform 4.0
• Cisco ONS 15454 Optical Transport Platform

Reported:

Jul 16, 2003

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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