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Cisco IOS XR Software Malformed RSVP Packet Denial of Service Vulnerability

Information

Severity

Severity

Medium

Family

Family

CISCO

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

6 years ago

Modified

Modified

3 years ago

Summary

A vulnerability in RSVP processing of Cisco IOS XR could allow an unauthenticated, remote attacker to cause a reload of the RSVP process on the affected device. The vulnerability is due to improper parsing of a malformed RSVP packet. An attacker could exploit this vulnerability by sending a malformed RSVP packet to be processed by an affected device. An exploit could allow the attacker to cause a reload of the RSVP process on the affected device. Cisco has confirmed the vulnerability and released software updates. To exploit this vulnerability, an attacker may need access to trusted, internal networks behind a firewall to send numerous TCP sessions to the targeted device. This access requirement may reduce the likelihood of a successful exploit.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

See the referenced vendor advisory for a solution.

Common Vulnerabilities and Exposures (CVE)