Asterisk: NULL Pointer Dereference in HTTP AMI Digest Authentication

{
  "id": "6a8230494802a1c42f951ae0260dd48aa814a672cc9131b8fa4074d40123f4b7",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-57195",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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 (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.",
    "evidence": "cve:CVE-2026-57195",
    "products": [
      {
        "name": {
          "value": "asterisk",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "certified-asterisk",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-57195",
      "aliases": [
        "CVE-2026-57195"
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 7.5,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "integrityImpact": "NONE",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "NONE"
          }
        }
      ],
      "affected": [
        {
          "vendor": "asterisk",
          "product": "asterisk",
          "versions": [
            {
              "status": "affected",
              "version": "< 20.20.1"
            },
            {
              "status": "affected",
              "version": ">= 21.0.0-pre1, < 21.12.3"
            },
            {
              "status": "affected",
              "version": ">= 22.0.0-pre1, < 22.10.1"
            },
            {
              "status": "affected",
              "version": ">= 23.0.0-pre1, < 23.4.1"
            }
          ]
        },
        {
          "vendor": "asterisk",
          "product": "certified-asterisk",
          "versions": [
            {
              "status": "affected",
              "version": "< 20.7-cert11"
            },
            {
              "status": "affected",
              "version": ">= 22.8-cert1-pre1, < 22.8-cert3"
            }
          ]
        }
      ],
      "modified": "2026-10-27T21:04:25.747Z",
      "provider": "cve",
      "references": [
        "https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw",
        "https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41",
        "https://github.com/asterisk/asterisk/commit/362ef847e7e057b7626e476ddcfe7328ea314db4",
        "https://github.com/asterisk/asterisk/commit/5d5d8d8ef7f16774820b1889ae73d8d2ab14af45",
        "https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663",
        "https://github.com/asterisk/asterisk/commit/a1fcfdf9b91ed58cc8fb9da8d135da60bae7345d",
        "https://github.com/asterisk/asterisk/commit/abba42c58fee2226a709583afdbeec75cf1dde8b",
        "https://github.com/asterisk/asterisk/commit/fff89162cdd702e8a143701f138edd8dceab154f",
        "https://github.com/asterisk/asterisk/releases/tag/20.20.1",
        "https://github.com/asterisk/asterisk/releases/tag/21.12.3",
        "https://github.com/asterisk/asterisk/releases/tag/22.10.1",
        "https://github.com/asterisk/asterisk/releases/tag/23.4.1",
        "https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11",
        "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3",
        "https://github.com/asterisk/asterisk/tree/24.0.0-pre1"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
          "shortName": "GitHub_M",
          "dateUpdated": "2026-10-27T21:04:25.747Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-57195",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 398631,
  "published_at": "2026-10-27T21:04:25.747+00:00"
}