CVE-2026-57202 (GCVE-0-2026-57202)

Vulnerability from cvelistv5 – Published: 2026-10-27 17:58 – Updated: 2026-10-27 17:58
VLAI
Title
Asterisk: ARI setChannelVar bypasses live_dangerously and permits FILE() writes
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 authenticated Asterisk REST Interface (ARI) attacker with read-only privileges may use `setChannelVar` to execute write dialplan functions, including `FILE()` writes, even when `live_dangerously` in `asterisk.conf` is set to no. The Asterisk HTTP web server must be enabled and reachable, and the attacker must already have valid `read-only ARI credentials`. HTTP is disabled by default and 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
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-267 - Privilege Defined With Unsafe Actions
  • CWE-1220 - Insufficient Granularity of Access Control
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": [
        {
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          "vendor": "asterisk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 20.20.1"
            },
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              "status": "affected",
              "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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              "status": "affected",
              "version": "\u003e= 23.0.0-pre1, \u003c 23.4.1"
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              "version": "\u003c 20.7-cert11"
            },
            {
              "status": "affected",
              "version": "\u003e= 22.8-cert1-pre1, \u003c 22.8-cert3"
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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, an authenticated Asterisk REST Interface (ARI) attacker with read-only privileges may use `setChannelVar` to execute write dialplan functions, including `FILE()` writes, even when `live_dangerously` in `asterisk.conf` is set to no. The Asterisk HTTP web server must be enabled and reachable, and the attacker must already have valid `read-only ARI credentials`. HTTP is disabled by default and 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": [
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
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              "description": "CWE-267: Privilege Defined With Unsafe Actions",
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              "type": "CWE"
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          ]
        },
        {
          "descriptions": [
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              "cweId": "CWE-1220",
              "description": "CWE-1220: Insufficient Granularity of Access Control",
              "lang": "en",
              "type": "CWE"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-27T17:58:46.257Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-vrfp-mg3q-3959",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-vrfp-mg3q-3959"
        },
        {
          "name": "https://github.com/asterisk/asterisk/commit/8f8ccaf70a80e518147b0c35c0c252de4735446f",
          "tags": [
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          "url": "https://github.com/asterisk/asterisk/commit/8f8ccaf70a80e518147b0c35c0c252de4735446f"
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          "tags": [
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          "url": "https://github.com/asterisk/asterisk/commit/92a5dd1003b737ae1cd2df4e60b73beb8d5e42bb"
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          "tags": [
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          "url": "https://github.com/asterisk/asterisk/commit/ba04e7f1f98887c3c6e0dc4ddce663021f7e948a"
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          "name": "https://github.com/asterisk/asterisk/commit/bf9354267557ef6d6b75f5304faa243f595a5a66",
          "tags": [
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          "url": "https://github.com/asterisk/asterisk/commit/bf9354267557ef6d6b75f5304faa243f595a5a66"
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          "name": "https://github.com/asterisk/asterisk/commit/caa4d50d9c3bf04fc979b5b2cdc5dc425772d845",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/asterisk/asterisk/commit/caa4d50d9c3bf04fc979b5b2cdc5dc425772d845"
        },
        {
          "name": "https://github.com/asterisk/asterisk/commit/d47b0b6e5a384746db194f751b53d559aba8dba9",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/asterisk/asterisk/commit/d47b0b6e5a384746db194f751b53d559aba8dba9"
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          "tags": [
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          "url": "https://github.com/asterisk/asterisk/commit/d8614505b27688dec3a1d14554f52fda94712928"
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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-vrfp-mg3q-3959",
        "discovery": "UNKNOWN"
      },
      "title": "Asterisk: ARI setChannelVar bypasses live_dangerously and permits FILE() writes"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-57202",
    "datePublished": "2026-10-27T17:58:46.257Z",
    "dateReserved": "2026-06-24T02:00:46.800Z",
    "dateUpdated": "2026-10-27T17:58:46.257Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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    "epss": {
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      "date": "2026-10-28",
      "epss": "0.0044",
      "percentile": "0.38127"
    },
    "nvd": {
      "cve": {
        "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"
          }
        ],
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        "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 authenticated Asterisk REST Interface (ARI) attacker with read-only privileges may use `setChannelVar` to execute write dialplan functions, including `FILE()` writes, even when `live_dangerously` in `asterisk.conf` is set to no. The Asterisk HTTP web server must be enabled and reachable, and the attacker must already have valid `read-only ARI credentials`. HTTP is disabled by default and 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-2026-57202",
        "lastModified": "2026-10-28T14:22:07.513",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 8.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
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              "impactScore": 5.2,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
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        "published": "2026-10-27T18:17:37.550",
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            "url": "https://github.com/asterisk/asterisk/releases/tag/20.20.1"
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          {
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            "url": "https://github.com/asterisk/asterisk/releases/tag/21.12.3"
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            "url": "https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"
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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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                "value": "CWE-267"
              },
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            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
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    }
  }
}



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