{"id":"CVE-2026-57195","title":"Asterisk: NULL Pointer Dereference in HTTP AMI Digest Authentication","summary":"Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, a NULL pointer dereference in the `Asterisk Manager Interface (…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-476"],"vendor":"asterisk","product":"asterisk","affected":["asterisk < 20.20.1","asterisk >= 21.0.0-pre1, < 21.12.3","asterisk >= 22.0.0-pre1, < 22.10.1","asterisk >= 23.0.0-pre1, < 23.4.1","certified-asterisk < 20.7-cert11","certified-asterisk >= 22.8-cert1-pre1, < 22.8-cert3"],"published":"2026-10-27","updated":"2026-10-27","sourceUpdated":"2026-10-27T21:04:25.747Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-57195","references":[{"url":"https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw","label":"https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw"},{"url":"https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41","label":"https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41"},{"url":"https://github.com/asterisk/asterisk/commit/362ef847e7e057b7626e476ddcfe7328ea314db4","label":"https://github.com/asterisk/asterisk/commit/362ef847e7e057b7626e476ddcfe7328ea314db4"},{"url":"https://github.com/asterisk/asterisk/commit/5d5d8d8ef7f16774820b1889ae73d8d2ab14af45","label":"https://github.com/asterisk/asterisk/commit/5d5d8d8ef7f16774820b1889ae73d8d2ab14af45"},{"url":"https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663","label":"https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663"},{"url":"https://github.com/asterisk/asterisk/commit/a1fcfdf9b91ed58cc8fb9da8d135da60bae7345d","label":"https://github.com/asterisk/asterisk/commit/a1fcfdf9b91ed58cc8fb9da8d135da60bae7345d"},{"url":"https://github.com/asterisk/asterisk/commit/abba42c58fee2226a709583afdbeec75cf1dde8b","label":"https://github.com/asterisk/asterisk/commit/abba42c58fee2226a709583afdbeec75cf1dde8b"},{"url":"https://github.com/asterisk/asterisk/commit/fff89162cdd702e8a143701f138edd8dceab154f","label":"https://github.com/asterisk/asterisk/commit/fff89162cdd702e8a143701f138edd8dceab154f"},{"url":"https://github.com/asterisk/asterisk/releases/tag/20.20.1","label":"https://github.com/asterisk/asterisk/releases/tag/20.20.1"},{"url":"https://github.com/asterisk/asterisk/releases/tag/21.12.3","label":"https://github.com/asterisk/asterisk/releases/tag/21.12.3"},{"url":"https://github.com/asterisk/asterisk/releases/tag/22.10.1","label":"https://github.com/asterisk/asterisk/releases/tag/22.10.1"},{"url":"https://github.com/asterisk/asterisk/releases/tag/23.4.1","label":"https://github.com/asterisk/asterisk/releases/tag/23.4.1"},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11","label":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"},{"url":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3","label":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"},{"url":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1","label":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1"}],"tags":["cve.org"],"ingestedAt":"2026-10-27T21:58:08.882Z","slug":"CVE-2026-57195","body":"## Overview\n\nAsterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, a NULL pointer dereference in the `Asterisk Manager Interface (AMI)` may allow an unauthenticated attacker to crash Asterisk when `Digest Authentication` is used via `HTTP`. The Asterisk `HTTP` web server, AMI, and AMI access via `HTTP` must all be enabled; each is disabled by default. The attacker must be able to connect to the `HTTP` server, which binds only to `127.0.0.1` by default even when enabled. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.\n\n## Affected\n\n- `asterisk < 20.20.1`\n- `asterisk >= 21.0.0-pre1, < 21.12.3`\n- `asterisk >= 22.0.0-pre1, < 22.10.1`\n- `asterisk >= 23.0.0-pre1, < 23.4.1`\n- `certified-asterisk < 20.7-cert11`\n- `certified-asterisk >= 22.8-cert1-pre1, < 22.8-cert3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}