Cisco IOS IPS Denial of Service Vulnerability - Cisco Systems

high Nessus Plugin ID 49019
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The remote device is missing a vendor-supplied security patch.


The Cisco IOS Intrusion Prevention System (IPS) feature contains a vulnerability in the processing of certain IPS signatures that use the SERVICE.DNS engine. This vulnerability may cause a router to crash or hang, resulting in a denial of service condition.

Cisco has released free software updates that address this vulnerability. There is a workaround for this vulnerability.

Note: This vulnerability is not related in any way to CVE-2008-1447 - Cache poisoning attacks.


Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20080924-iosips.

See Also

Plugin Details

Severity: High

ID: 49019

File Name: cisco-sa-20080924-iosipshttp.nasl

Version: 1.24

Type: combined

Family: CISCO

Published: 9/1/2010

Updated: 11/15/2018

Dependencies: cisco_ios_version.nasl

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

Temporal Vector: E:U/RL:OF/RC: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: 9/24/2008

Vulnerability Publication Date: 9/24/2008

Reference Information

CVE: CVE-2008-2739

BID: 31364


CISCO-SA: cisco-sa-20080924-iosips