{"id":"CVE-2009-2661","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-2661","generatedAt":"2026-10-27T21:08:12.377Z","title":"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…","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.","published":"2009-08-04T16:30:00.000Z","lastModified":"2026-06-16T23:09:57.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P"},"cwe":["CWE-310"],"affected":["strongswan/strongswan"],"epss":{"score":0.01577,"percentile":0.75296,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.58%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://download.strongswan.org/patches/07_asn1_length_patch/strongswan-4.3.x_asn1_length.patch","source":"cve@mitre.org"},{"url":"http://download.strongswan.org/patches/07_asn1_length_patch/strongswan-4.x.x_asn1_length.patch","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/36922","source":"cve@mitre.org"},{"url":"http://up2date.astaro.com/2009/08/up2date_7505_released.html","source":"cve@mitre.org"},{"url":"http://www.debian.org/security/2009/dsa-1899","source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2009/07/27/1","source":"cve@mitre.org"},{"url":"http://www.vupen.com/english/advisories/2009/2247","source":"cve@mitre.org"},{"url":"https://lists.strongswan.org/pipermail/announce/2009-July/000056.html","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://download.strongswan.org/patches/07_asn1_length_patch/strongswan-4.3.x_asn1_length.patch","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://download.strongswan.org/patches/07_asn1_length_patch/strongswan-4.x.x_asn1_length.patch","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36922","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://up2date.astaro.com/2009/08/up2date_7505_released.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2009/dsa-1899","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2009/07/27/1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2009/2247","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.strongswan.org/pipermail/announce/2009-July/000056.html","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-2661","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}