TITLE:
Cisco IOS Stack Group Bidding Protocol Denial of Service

SECUNIA ADVISORY ID:
SA18490

VERIFY ADVISORY:
http://secunia.com/advisories/18490/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

OPERATING SYSTEM:
Cisco IOS 12.x
http://secunia.com/product/182/
Cisco IOS R12.x
http://secunia.com/product/50/

DESCRIPTION:
A vulnerability has been reported in Cisco IOS, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the handling of the
SGBP protocol (Stack Group Bidding Protocol). This can be exploited
to cause a vulnerable device to become unresponsive and trigger a
hardware reset by sending a specially crafted UDP datagram to port
9900.

The vulnerability affects all Cisco products running the Cisco IOS
software and has enabled support for the SGBP protocol.

SOLUTION:
Fixes are available for IOS 12.0, 12.1, 12.2, 12.3, and 12.4 (see
patch matrix in vendor advisory).
http://www.cisco.com/warp/public/707/cisco-sa-20060118-sgbp.shtml#software

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

ORIGINAL ADVISORY:
Cisco:
http://www.cisco.com/warp/public/707/cisco-sa-20060118-sgbp.shtml

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