Cisco IOS Software IPv6 Virtual Fragmentation Reassembly Denial of Service Vulnerability (cisco-sa-20130925-ipv6vfr)

high Nessus Plugin ID 70319

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

A vulnerability in the implementation of the virtual fragmentation reassembly (VFR) feature for IP version 6 (IPv6) in Cisco IOS Software could allow an unauthenticated, remote attacker to cause an affected device to hang or reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a race condition while accessing the reassembly queue for IPv6 fragments. An attacker could exploit this vulnerability by sending a crafted stream of valid IPv6 fragments. Repeated exploitation may result in a sustained DoS condition. Cisco has released free software updates that address this vulnerability. There are no workarounds for this vulnerability.

Solution

Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20130925-ipv6vfr.

Plugin Details

Severity: High

ID: 70319

File Name: cisco-sa-20130925-ipv6vfr.nasl

Version: 1.13

Type: combined

Family: CISCO

Published: 10/7/2013

Updated: 11/15/2018

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 9/23/2013

Vulnerability Publication Date: 9/25/2013

Reference Information

CVE: CVE-2013-5474

BID: 62638

CISCO-SA: cisco-sa-20130925-ipv6vfr

CISCO-BUG-ID: CSCud64812

Detections

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