{"id":"CVE-2013-5018","url":"https://www.cyber-defence.io/tools/cve/CVE-2013-5018","generatedAt":"2026-10-27T20:52:58.757Z","title":"The is_asn1 function in strongSwan 4.1.11 through 5.0.4 does not properly validate the return value of the asn1_length function, which allows remote attackers to cause a denial of service (segmentation fault) via a (1) XAuth username, (2) EAP identity,…","description":"The is_asn1 function in strongSwan 4.1.11 through 5.0.4 does not properly validate the return value of the asn1_length function, which allows remote attackers to cause a denial of service (segmentation fault) via a (1) XAuth username, (2) EAP identity, or (3) PEM encoded file that starts with a 0x04, 0x30, or 0x31 character followed by an ASN.1 length value that triggers an integer overflow.","published":"2013-08-28T23:55:11.000Z","lastModified":"2026-06-16T23:58:16.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":4.3,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P"},"cwe":["CWE-119"],"affected":["strongswan/strongswan","opensuse/opensuse"],"epss":{"score":0.02985,"percentile":0.8721,"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 (2.99%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/54315","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/54524","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/61564","source":"cve@mitre.org"},{"url":"https://lists.strongswan.org/pipermail/users/2013-July/009540.html","tags":["Exploit"],"source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-updates/2013-08/msg00021.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2013-08/msg00022.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2013-08/msg00050.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/54315","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/54524","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://strongswan.org/blog/2013/08/01/strongswan-5.1.0-released.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://strongswan.org/blog/2013/08/01/strongswan-denial-of-service-vulnerability-%28cve-2013-5018%29.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/61564","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.strongswan.org/pipermail/users/2013-July/009540.html","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2013-5018","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."}