Cisco IOS Software Multiple Network Address Translation (NAT) Denial of Service Vulnerabilities (cisco-sa-20140326-nat)

high Nessus Plugin ID 73345

Language:

Synopsis

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

Description

According to its self-reported version, the version of Cisco IOS running on the remote host is affected by multiple denial of service vulnerabilities in the Network Address Translation (NAT) implementation :

- An issue exists in the TCP Input module due to the improper handling of certain sequences of TCP packets.
An unauthenticated, remote attacker could potentially exploit this issue by sending a specific sequence of IPv4 TCP packets resulting in a denial of service.
(CVE-2014-2109)

- An issue exists in the Application Layer Gateway (ALG) module due to the improper handling of malformed DNS packets during the NAT procedure. An unauthenticated, remote attacker could potentially exploit this issue by sending malformed IPv4 DNS packets resulting in a denial of service. (CVE-2014-2111)

Note that IPv6 packets cannot be used to exploit these issues.

Solution

Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20140326-nat.

Plugin Details

Severity: High

ID: 73345

File Name: cisco-sa-20140326-nat.nasl

Version: 1.9

Type: combined

Family: CISCO

Published: 4/4/2014

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: 1/10/2014

Vulnerability Publication Date: 3/26/2014

Reference Information

CVE: CVE-2014-2109, CVE-2014-2111

BID: 66470

CISCO-SA: cisco-sa-20140326-nat

CISCO-BUG-ID: CSCue00996, CSCuh33843, CSCuj41494

Detections

Analytics