Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2009-2661

5.0 · MEDIUM

The asn1_length function in strongSwan 2.8 before 2.8.11, 4.2 before 4.2.17, and 4.3 before 4.3.3 does not properly handle X.509 certificates with crafted Relative Distinguished Names (RDNs), which…

Published Aug 4, 2009strongswanCWE-310EPSS 1.58%

Overview

CVE-2009-2661 is a medium-severity vulnerability affecting strongswan strongswan. It was published on August 4, 2009 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The asn1_length function in strongSwan 2.8 before 2.8.11, 4.2 before 4.2.17, and 4.3 before 4.3.3 does not properly handle X.509 certificates with crafted Relative Distinguished Names (RDNs), which allows remote attackers to cause a denial of service (pluto IKE daemon crash) via malformed ASN.1 data. NOTE: this is due to an incomplete fix for CVE-2009-2185.

Remediation

Check the references section for vendor advisories and patches from strongswan. Update strongswan to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refdownload.strongswan.org/patches/07_asn1_length_patch/strongswan-4.3.x_asn1_length.patchRefdownload.strongswan.org/patches/07_asn1_length_patch/strongswan-4.x.x_asn1_length.patchReflists.opensuse.org/opensuse-security-announce/2009-10/msg00001.htmlReflists.opensuse.org/opensuse-security-announce/2009-11/msg00004.htmlRefsecunia.com/advisories/36922Refup2date.astaro.com/2009/08/up2date_7505_released.htmlRefwww.debian.org/security/2009/dsa-1899Refwww.openwall.com/lists/oss-security/2009/07/27/1Refwww.vupen.com/english/advisories/2009/2247Reflists.strongswan.org/pipermail/announce/2009-July/000056.html

How CyberStrike helps

Frequently asked questions

What is CVE-2009-2661?

CVE-2009-2661 is a medium-severity vulnerability affecting strongswan strongswan. It was published on August 4, 2009 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2009-2661?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-2661?

Check the references section for vendor advisories and patches from strongswan. Update strongswan to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-2661?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-2661 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2009

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999