FKIE_CVE-2026-57194

Vulnerability from fkie_nvd - Published: 2026-10-27 17:17 - Updated: 2026-10-27 17:17
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/430f423c84e4e32a462d907632b66c9793236e96
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/6da8e10c210d8e014c27c67235252e1dfc794446
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/6f414ec771eaa3318a4b2d28f70fa387196ae283
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/ce6e2233599b76bc30c33b4816b15609c8ddc8b6
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/d803b5370b05f39a6241b2556eb9894b02148e6a
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/fc3a1cb3c386c962bfca8cd9d533d1390d4ad933
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/ff65e4b0867bee12cdcb3a6219b976ee7ee08963
security-advisories@github.comhttps://github.com/asterisk/asterisk/releases/tag/20.20.1
security-advisories@github.comhttps://github.com/asterisk/asterisk/releases/tag/21.12.3
security-advisories@github.comhttps://github.com/asterisk/asterisk/releases/tag/22.10.1
security-advisories@github.comhttps://github.com/asterisk/asterisk/releases/tag/23.4.1
security-advisories@github.comhttps://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11
security-advisories@github.comhttps://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3
security-advisories@github.comhttps://github.com/asterisk/asterisk/security/advisories/GHSA-3g56-cgrh-95p5
security-advisories@github.comhttps://github.com/asterisk/asterisk/tree/24.0.0-pre1
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "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"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-57194",
  "lastModified": "2026-10-27T17:17:01.620",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-27T17:17:01.620",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/commit/430f423c84e4e32a462d907632b66c9793236e96"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/commit/6da8e10c210d8e014c27c67235252e1dfc794446"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/commit/6f414ec771eaa3318a4b2d28f70fa387196ae283"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/commit/ce6e2233599b76bc30c33b4816b15609c8ddc8b6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/commit/d803b5370b05f39a6241b2556eb9894b02148e6a"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/commit/fc3a1cb3c386c962bfca8cd9d533d1390d4ad933"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/commit/ff65e4b0867bee12cdcb3a6219b976ee7ee08963"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/releases/tag/20.20.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/releases/tag/21.12.3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/releases/tag/22.10.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/releases/tag/23.4.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-3g56-cgrh-95p5"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/asterisk/asterisk/tree/24.0.0-pre1"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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