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Research > Zero-Day Tracker > 20131122

Cisco IOS ICMP Denial of Service Vulnerability

Date Disclosed:
11/22/2013

Date Patched:
Patch Not Yet Available

Vendor:
Cisco

Affected Software:
Cisco IOS 15.2M and 15.2(4)M, earlier versions may be affected as well

Description:
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.

Severity:
Moderate

Code Execution:
No.

Impact:
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. 

Mitigation:
No mitigations are currently available. 

Protection:
BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.

  • 31618 - Cisco IOS Denial of Service Vulnerability (20131122) (Zero-Day)

Links:

Status:
2013-11-22 - Public disclosure.

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