Research > Zero-Day Tracker > 20131122
Cisco IOS ICMP Denial of Service Vulnerability
Patch Not Yet Available
Cisco IOS 15.2M and 15.2(4)M, earlier versions may be affected as well
A vulnerability exists within IOS that allows a remote, unauthenticated attacker to cause a denial of service condition to arise via maliciously crafted ICMP packets. This may cause IPSec tunnels to fail.
Denial of Service
Remote, unauthenticated attackers can send specially crafted ICMP packets which will change the already-configured MTU value of the tunnel interface. This will cause IPSec tunnels on the affected system to drop, thereby becoming unusable.
No mitigations are currently available.
BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.
31618 - Cisco IOS Denial of Service Vulnerability (20131122) (Zero-Day)
2013-11-22 - Public disclosure.
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