Intrusion Prevention

Cisco.IPv4.DoS

Description

Cisco IOS, 11.X and 12.0 through 12.2, has a denial of service vulnerability. A remote attacker can cause multiple Cisco routers and switches running Cisco IOS to stop processing traffic, so that the device must be rebooted to regain normal functionality.

Affected Products

Denial of Service

Impact

Cisco Systems, Inc.: Cisco IOS 11.1CA
Cisco Systems, Inc.: Cisco IOS 11.2
Cisco Systems, Inc.: Cisco IOS 11.2P
Cisco Systems, Inc.: Cisco IOS 11.3
Cisco Systems, Inc.: Cisco IOS 11.3T
Cisco Systems, Inc.: Cisco IOS 12.0
Cisco Systems, Inc.: Cisco IOS 12.0(2) to 12.0(7)
Cisco Systems, Inc.: Cisco IOS 12.0DA - 12.0DC
Cisco Systems, Inc.: Cisco IOS 12.0S
Cisco Systems, Inc.: Cisco IOS 12.0SC
Cisco Systems, Inc.: Cisco IOS 12.0SL
Cisco Systems, Inc.: Cisco IOS 12.0SP
Cisco Systems, Inc.: Cisco IOS 12.0ST
Cisco Systems, Inc.: Cisco IOS 12.0SX
Cisco Systems, Inc.: Cisco IOS 12.0SY
Cisco Systems, Inc.: Cisco IOS 12.0SZ
Cisco Systems, Inc.: Cisco IOS 12.0T
Cisco Systems, Inc.: Cisco IOS 12.0W5
Cisco Systems, Inc.: Cisco IOS 12.0WC
Cisco Systems, Inc.: Cisco IOS 12.0WT
Cisco Systems, Inc.: Cisco IOS 12.1
Cisco Systems, Inc.: Cisco IOS 12.1AA
Cisco Systems, Inc.: Cisco IOS 12.1AX
Cisco Systems, Inc.: Cisco IOS 12.1AY
Cisco Systems, Inc.: Cisco IOS 12.1DA-12.1DC
Cisco Systems, Inc.: Cisco IOS 12.1E
Cisco Systems, Inc.: Cisco IOS 12.1EA
Cisco Systems, Inc.: Cisco IOS 12.1EB
Cisco Systems, Inc.: Cisco IOS 12.1EC
Cisco Systems, Inc.: Cisco IOS 12.1EV
Cisco Systems, Inc.: Cisco IOS 12.1EW
Cisco Systems, Inc.: Cisco IOS 12.1EX
Cisco Systems, Inc.: Cisco IOS 12.1EY
Cisco Systems, Inc.: Cisco IOS 12.1T
Cisco Systems, Inc.: Cisco IOS 12.1X - 12.1XD
Cisco Systems, Inc.: Cisco IOS 12.1X F- 12.1XJ
Cisco Systems, Inc.: Cisco IOS 12.1XL
Cisco Systems, Inc.: Cisco IOS 12.1XM
Cisco Systems, Inc.: Cisco IOS 12.1XP - 12.1XR
Cisco Systems, Inc.: Cisco IOS 12.1XT - 12.1XV
Cisco Systems, Inc.: Cisco IOS 12.1YB - 12.1YF
Cisco Systems, Inc.: Cisco IOS 12.1YH
Cisco Systems, Inc.: Cisco IOS 12.1YI
Cisco Systems, Inc.: Cisco IOS 12.1YJ
Cisco Systems, Inc.: Cisco IOS 12.2
Cisco Systems, Inc.: Cisco IOS 12.2B
Cisco Systems, Inc.: Cisco IOS 12.2BC
Cisco Systems, Inc.: Cisco IOS 12.2BW
Cisco Systems, Inc.: Cisco IOS 12.2BX
Cisco Systems, Inc.: Cisco IOS 12.2BZ
Cisco Systems, Inc.: Cisco IOS 12.2CX
Cisco Systems, Inc.: Cisco IOS 12.2CY
Cisco Systems, Inc.: Cisco IOS 12.2DA
Cisco Systems, Inc.: Cisco IOS 12.2DD
Cisco Systems, Inc.: Cisco IOS 12.2DX
Cisco Systems, Inc.: Cisco IOS 12.2JA
Cisco Systems, Inc.: Cisco IOS 12.2MB
Cisco Systems, Inc.: Cisco IOS 12.2MC
Cisco Systems, Inc.: Cisco IOS 12.2S
Cisco Systems, Inc.: Cisco IOS 12.2SX - 12.2SZ
Cisco Systems, Inc.: Cisco IOS 12.2T
Cisco Systems, Inc.: Cisco IOS 12.2X
Cisco Systems, Inc.: Cisco IOS 12.2Y - 12.2YD
Cisco Systems, Inc.: Cisco IOS 12.2YF - 12.2YH
Cisco Systems, Inc.: Cisco IOS 12.2YJ - 12.2YZ

Recommended Actions

Apply the appropriate patch for your system.
http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml

CVE References

CVE-2003-0567