CVE-2026-57194 (GCVE-0-2026-57194)
Vulnerability from cvelistv5
Published
2026-10-27 16:52
Modified
2026-10-27 16:52
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
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, an out-of-bounds write in `chan_unistim` `DIALPAGE` digit handling can overflow the `phone_number` field and crash Asterisk when an attacker sends a carefully crafted incoming request packet. The `chan_unistim` module must be loaded and configured with a valid `UNISTIM UDP port` that the attacker can reach. The attacker must register as a configured `phone MAC`, or the deployment must have an equivalent `production/autoprovisioning` path that allows the client to reach the main page. 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.
References
Impacted products
Vendor Product Version
asterisk asterisk Version: < 20.20.1
Version: >= 21.0.0-pre1, < 21.12.3
Version: >= 22.0.0-pre1, < 22.10.1
Version: >= 23.0.0-pre1, < 23.4.1
 Create a notification for this product.
   asterisk certified-asterisk Version: < 20.7-cert11
Version: >= 22.8-cert1-pre1, < 22.8-cert3
 Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "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, an out-of-bounds write in `chan_unistim` `DIALPAGE` digit handling can overflow the `phone_number` field and crash Asterisk when an attacker sends a carefully crafted incoming request packet. The `chan_unistim` module must be loaded and configured with a valid `UNISTIM UDP port` that the attacker can reach. The attacker must register as a configured `phone MAC`, or the deployment must have an equivalent `production/autoprovisioning` path that allows the client to reach the main page. 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": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-27T16:52:47.225Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-3g56-cgrh-95p5",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-3g56-cgrh-95p5"
        },
        {
          "name": "https://github.com/asterisk/asterisk/commit/430f423c84e4e32a462d907632b66c9793236e96",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/commit/430f423c84e4e32a462d907632b66c9793236e96"
        },
        {
          "name": "https://github.com/asterisk/asterisk/commit/6da8e10c210d8e014c27c67235252e1dfc794446",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/commit/6da8e10c210d8e014c27c67235252e1dfc794446"
        },
        {
          "name": "https://github.com/asterisk/asterisk/commit/6f414ec771eaa3318a4b2d28f70fa387196ae283",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/commit/6f414ec771eaa3318a4b2d28f70fa387196ae283"
        },
        {
          "name": "https://github.com/asterisk/asterisk/commit/ce6e2233599b76bc30c33b4816b15609c8ddc8b6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/commit/ce6e2233599b76bc30c33b4816b15609c8ddc8b6"
        },
        {
          "name": "https://github.com/asterisk/asterisk/commit/d803b5370b05f39a6241b2556eb9894b02148e6a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/commit/d803b5370b05f39a6241b2556eb9894b02148e6a"
        },
        {
          "name": "https://github.com/asterisk/asterisk/commit/fc3a1cb3c386c962bfca8cd9d533d1390d4ad933",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/commit/fc3a1cb3c386c962bfca8cd9d533d1390d4ad933"
        },
        {
          "name": "https://github.com/asterisk/asterisk/commit/ff65e4b0867bee12cdcb3a6219b976ee7ee08963",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/asterisk/asterisk/commit/ff65e4b0867bee12cdcb3a6219b976ee7ee08963"
        },
        {
          "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-3g56-cgrh-95p5",
        "discovery": "UNKNOWN"
      },
      "title": "Asterisk: chan_unistim DIALPAGE digit handling can overflow phone_number and crash Asterisk"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-57194",
    "datePublished": "2026-10-27T16:52:47.225Z",
    "dateReserved": "2026-06-24T02:00:46.800Z",
    "dateUpdated": "2026-10-27T16:52:47.225Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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