Cisco IOS Software Internet Key Exchange Resource Exhaustion Vulnerability - Cisco Systems

high Nessus Plugin ID 49044
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The remote device is missing a vendor-supplied security patch.


Cisco IOS devices that are configured for Internet Key Exchange (IKE) protocol and certificate based authentication are vulnerable to a resource exhaustion attack. Successful exploitation of this vulnerability may result in the allocation of all available Phase 1 security associations (SA) and prevent the establishment of new IPsec sessions.
Cisco has released free software updates that address this vulnerability.


Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20090923-ipsec.

See Also

Plugin Details

Severity: High

ID: 49044

File Name: cisco-sa-20090923-ipsechttp.nasl

Version: 1.19

Type: local

Family: CISCO

Published: 9/1/2010

Updated: 11/15/2018

Dependencies: cisco_ios_version.nasl

Risk Information


Risk Factor: Low

Score: 3.4


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: 9/23/2009

Vulnerability Publication Date: 9/23/2009

Reference Information

CVE: CVE-2009-2868

BID: 36497