Crafted IP Option Vulnerability
Critical Nessus Plugin ID 48996
SynopsisThe remote device is missing a vendor-supplied security patch.
DescriptionCisco routers and switches running Cisco IOS or Cisco IOS XR software may be vulnerable to a remotely exploitable crafted IP option Denial of Service (DoS) attack. Exploitation of the vulnerability may potentially allow for arbitrary code execution. The vulnerability may be exploited after processing an Internet Control Message Protocol (ICMP) packet, Protocol Independent Multicast version 2 (PIMv2) packet, Pragmatic General Multicast (PGM) packet, or URL Rendezvous Directory (URD) packet containing a specific crafted IP option in the packet's IP header. No other IP protocols are affected by this issue.
Cisco has made free software available to address this vulnerability for affected customers.
SolutionApply the relevant patch referenced in Cisco Security Advisory cisco-sa-20070124-crafted-ip-option.