CVE-2026-57195 (GCVE-0-2026-57195)

Vulnerability from cvelistv5 – Published: 2026-10-27 21:04 – Updated: 2026-10-27 21:04
VLAI
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7858 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
asterisk asterisk Affected: < 20.20.1
Affected: >= 21.0.0-pre1, < 21.12.3
Affected: >= 22.0.0-pre1, < 22.10.1
Affected: >= 23.0.0-pre1, < 23.4.1
guessed Create a notification for this product.
asterisk certified-asterisk Affected: < 20.7-cert11
Affected: >= 22.8-cert1-pre1, < 22.8-cert3
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
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      "affected": [
        {
          "product": "asterisk",
          "vendor": "asterisk",
          "versions": [
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              "status": "affected",
              "version": "\u003c 20.20.1"
            },
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              "version": "\u003e= 21.0.0-pre1, \u003c 21.12.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 22.0.0-pre1, \u003c 22.10.1"
            },
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              "version": "\u003e= 23.0.0-pre1, \u003c 23.4.1"
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            }
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          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-27T21:04:25.747Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw"
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          "name": "https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41",
          "tags": [
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          "url": "https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41"
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          "tags": [
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          "url": "https://github.com/asterisk/asterisk/commit/362ef847e7e057b7626e476ddcfe7328ea314db4"
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        {
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          "url": "https://github.com/asterisk/asterisk/commit/5d5d8d8ef7f16774820b1889ae73d8d2ab14af45"
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        {
          "name": "https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663",
          "tags": [
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          "url": "https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663"
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          "url": "https://github.com/asterisk/asterisk/commit/a1fcfdf9b91ed58cc8fb9da8d135da60bae7345d"
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          "tags": [
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          "url": "https://github.com/asterisk/asterisk/commit/abba42c58fee2226a709583afdbeec75cf1dde8b"
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          "url": "https://github.com/asterisk/asterisk/commit/fff89162cdd702e8a143701f138edd8dceab154f"
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        {
          "name": "https://github.com/asterisk/asterisk/releases/tag/20.20.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/releases/tag/20.20.1"
        },
        {
          "name": "https://github.com/asterisk/asterisk/releases/tag/21.12.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/releases/tag/21.12.3"
        },
        {
          "name": "https://github.com/asterisk/asterisk/releases/tag/22.10.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/releases/tag/22.10.1"
        },
        {
          "name": "https://github.com/asterisk/asterisk/releases/tag/23.4.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/releases/tag/23.4.1"
        },
        {
          "name": "https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"
        },
        {
          "name": "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"
        },
        {
          "name": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1"
        }
      ],
      "source": {
        "advisory": "GHSA-3rhj-hhw7-m6fw",
        "discovery": "UNKNOWN"
      },
      "title": "Asterisk: NULL Pointer Dereference in HTTP AMI Digest Authentication"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-57195",
    "datePublished": "2026-10-27T21:04:25.747Z",
    "dateReserved": "2026-06-24T02:00:46.800Z",
    "dateUpdated": "2026-10-27T21:04:25.747Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-10-28",
      "epss": "0.00573",
      "percentile": "0.47239"
    },
    "nvd": {
      "cve": {
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          {
            "affectedData": [
              {
                "product": "asterisk",
                "vendor": "asterisk",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 20.20.1"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 21.0.0-pre1, \u003c 21.12.3"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 22.0.0-pre1, \u003c 22.10.1"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 23.0.0-pre1, \u003c 23.4.1"
                  }
                ]
              },
              {
                "product": "certified-asterisk",
                "vendor": "asterisk",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 20.7-cert11"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 22.8-cert1-pre1, \u003c 22.8-cert3"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
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            "lang": "en",
            "value": "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."
          }
        ],
        "id": "CVE-2026-57195",
        "lastModified": "2026-10-28T14:18:37.620",
        "metrics": {
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              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
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                "baseScore": 7.5,
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                "confidentialityImpact": "NONE",
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                "privilegesRequired": "NONE",
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                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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            "url": "https://github.com/asterisk/asterisk/releases/tag/20.20.1"
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            "url": "https://github.com/asterisk/asterisk/releases/tag/22.10.1"
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            "url": "https://github.com/asterisk/asterisk/releases/tag/23.4.1"
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          {
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            "url": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1"
          }
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        "vulnStatus": "Awaiting Analysis",
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            "type": "Primary"
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    }
  }
}



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