{"id":"CVE-2021-32558","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-32558","generatedAt":"2026-10-27T22:28:59.462Z","title":"If the IAX2 channel driver receives a packet that contains an unsupported media format, a crash can occur.","description":"An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.19.1, 17.x before 17.9.4, and 18.x before 18.5.1, and Certified Asterisk before 16.8-cert10. If the IAX2 channel driver receives a packet that contains an unsupported media format, a crash can occur.","published":"2021-07-30T14:15:17.000Z","lastModified":"2026-06-17T03:53:10.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-74"],"affected":["digium/asterisk","digium/certified asterisk","debian/debian linux"],"epss":{"score":0.09223,"percentile":0.95314,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (9.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/163639/Asterisk-Project-Security-Advisory-AST-2021-008.html","tags":["Patch","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://seclists.org/fulldisclosure/2021/Jul/49","tags":["Mailing List","Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://downloads.asterisk.org/pub/security/AST-2021-008.html","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://issues.asterisk.org/jira/browse/ASTERISK-29392","tags":["Exploit","Issue Tracking","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2021/08/msg00005.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.debian.org/security/2021/dsa-4999","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/163639/Asterisk-Project-Security-Advisory-AST-2021-008.html","tags":["Patch","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2021/Jul/49","tags":["Mailing List","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://downloads.asterisk.org/pub/security/AST-2021-008.html","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://issues.asterisk.org/jira/browse/ASTERISK-29392","tags":["Exploit","Issue Tracking","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2021/08/msg00005.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2021/dsa-4999","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-32558","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."}