{"id":"CVE-2009-0871","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-0871","generatedAt":"2026-10-27T19:39:00.655Z","title":"The SIP channel driver in Asterisk Open Source 1.4.22, 1.4.23, and 1.4.23.1; 1.6.0 before 1.6.0.6; 1.6.1 before 1.6.1.0-rc2; and Asterisk Business Edition C.2.3, with the pedantic option enabled, allows remote authenticated users to cause a denial of…","description":"The SIP channel driver in Asterisk Open Source 1.4.22, 1.4.23, and 1.4.23.1; 1.6.0 before 1.6.0.6; 1.6.1 before 1.6.1.0-rc2; and Asterisk Business Edition C.2.3, with the pedantic option enabled, allows remote authenticated users to cause a denial of service (crash) via a SIP INVITE request without any headers, which triggers a NULL pointer dereference in the (1) sip_uri_headers_cmp and (2) sip_uri_params_cmp functions.","published":"2009-03-11T14:19:15.000Z","lastModified":"2026-06-16T23:06:00.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":3.5,"severity":"LOW","vector":"AV:N/AC:M/Au:S/C:N/I:N/A:P"},"cwe":["CWE-20"],"affected":["digium/asterisk"],"epss":{"score":0.02569,"percentile":0.85041,"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 (2.57%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://bugs.digium.com/view.php?id=13547","source":"cve@mitre.org"},{"url":"http://bugs.digium.com/view.php?id=14417","source":"cve@mitre.org"},{"url":"http://downloads.digium.com/pub/security/AST-2009-002.html","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://osvdb.org/52568","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/34229","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/501656/100/0/threaded","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/34070","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id?1021834","source":"cve@mitre.org"},{"url":"http://www.vupen.com/english/advisories/2009/0667","source":"cve@mitre.org"},{"url":"http://bugs.digium.com/view.php?id=13547","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://bugs.digium.com/view.php?id=14417","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://downloads.digium.com/pub/security/AST-2009-002.html","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://osvdb.org/52568","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/34229","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/501656/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/34070","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1021834","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2009/0667","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-0871","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."}