Cisco 6000/6500/7600 Crafted Layer 2 Frame Vulnerability - Cisco Systems

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Synopsis :

The remote device is missing a vendor-supplied security patch

Description :

A layer 2 frame (as defined in the Open System Interconnection
Reference Model) that is encapsulating a layer 3 packet (IP, IPX, etc.)
may cause Cisco 6000/6500/7600 series systems with Multilayer Switch
Feature Card 2 (MSFC2) that have a FlexWAN or Optical Services Module
(OSM) or that run 12.1(8b)E14 to freeze or reset, if the actual length
of this frame is inconsistent with the length of the encapsulated layer
3 packet.
This vulnerability may be exploited repeatedly causing a denial of
service.
This vulnerability has been addressed by the Cisco Bug IDs CSCdy15598
and CSCeb56052.
There is no workaround available. A software upgrade is needed to
address the vulnerability.

See also :

http://www.nessus.org/u?efcdea28
http://www.nessus.org/u?b10c225d

Solution :

Apply the relevant patch referenced in Cisco Security Advisory
cisco-sa-20040203-cat6k.

Risk factor :

Medium / CVSS Base Score : 4.7
(CVSS2#AV:L/AC:M/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 4.0
(CVSS2#E:U/RL:U/RC:C)
Public Exploit Available : false

Family: CISCO

Nessus Plugin ID: 48973 (cisco-sa-20040203-cat6k.nasl)

Bugtraq ID: 9562

CVE ID: CVE-2004-0244