Cisco IOS XR Software Malformed RSVP Packet Denial of Service Vulnerability

2014-09-19T18:43:12
ID CISCO-SA-20140919-CVE-2014-3376
Type cisco
Reporter Cisco
Modified 2014-09-19T18:43:05

Description

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 in a security notice and released software updates.

To exploit this vulnerability, an attacker may need access to trusted, internal networks behind a firewall to send malformed RSVP packets to the targeted device. This access requirement may reduce the likelihood of a successful exploit. In addition, the attacker may need to obtain additional information such as whether the device has RSVP configured, which is a condition that must be met to exploit this vulnerability.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.