{"id":"CVE-2011-4598","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-4598","generatedAt":"2026-10-27T22:04:15.266Z","title":"The handle_request_info function in channels/chan_sip.c in Asterisk Open Source 1.6.2.x before 1.6.2.21 and 1.8.x before 1.8.7.2, when automon is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash)…","description":"The handle_request_info function in channels/chan_sip.c in Asterisk Open Source 1.6.2.x before 1.6.2.21 and 1.8.x before 1.8.7.2, when automon is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted sequence of SIP requests.","published":"2011-12-15T03:57:34.000Z","lastModified":"2026-06-16T23:35:07.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":4.3,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P"},"cwe":["CWE-200"],"affected":["digium/asterisk"],"epss":{"score":0.02354,"percentile":0.83617,"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 (2.35%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://downloads.asterisk.org/pub/security/AST-2011-014.html","source":"secalert@redhat.com"},{"url":"http://openwall.com/lists/oss-security/2011/12/09/3","source":"secalert@redhat.com"},{"url":"http://openwall.com/lists/oss-security/2011/12/09/4","source":"secalert@redhat.com"},{"url":"http://osvdb.org/77598","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/47273","source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2011/dsa-2367","source":"secalert@redhat.com"},{"url":"http://downloads.asterisk.org/pub/security/AST-2011-014.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2011/12/09/3","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2011/12/09/4","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://osvdb.org/77598","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/47273","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2011/dsa-2367","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-4598","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."}