{"id":"CVE-2011-2216","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-2216","generatedAt":"2026-10-27T17:56:44.998Z","title":"reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.2 does not initialize certain strings, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a malformed Contact…","description":"reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.2 does not initialize certain strings, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a malformed Contact header.","published":"2011-06-06T19:55:04.000Z","lastModified":"2026-06-16T23:30:57.000Z","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":[],"affected":["digium/asterisk"],"epss":{"score":0.04618,"percentile":0.91627,"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 (4.62%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://downloads.digium.com/pub/security/AST-2011-007.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062658.html","source":"cve@mitre.org"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062013.html","source":"cve@mitre.org"},{"url":"http://osvdb.org/72752","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/44828","source":"cve@mitre.org"},{"url":"http://securitytracker.com/id?1025598","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/518236/100/0/threaded","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/48096","source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/67812","source":"cve@mitre.org"},{"url":"http://downloads.digium.com/pub/security/AST-2011-007.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062658.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062013.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://osvdb.org/72752","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/44828","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://securitytracker.com/id?1025598","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/518236/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/48096","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/67812","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-2216","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."}