GSD-2021-46837

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation.
Aliases
Aliases
CVE-2021-46837
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{
  "GSD": {
    "alias": "CVE-2021-46837",
    "description": "res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation.",
    "id": "GSD-2021-46837",
    "references": [
      "https://www.debian.org/security/2022/dsa-5285"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-46837"
      ],
      "details": "res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation.",
      "id": "GSD-2021-46837",
      "modified": "2023-12-13T01:23:32.777080Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2021-46837",
        "STATE": "PUBLIC"
      },
      "affects": {
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          "vendor_data": [
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              "product": {
                "product_data": [
                  {
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                    "version": {
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                          "version_value": "n/a"
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          }
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            "refsource": "MISC",
            "url": "https://downloads.asterisk.org/pub/security/AST-2021-006.html"
          },
          {
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          },
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            "url": "https://www.debian.org/security/2022/dsa-5285"
          }
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    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
          {
            "children": [],
            "cpe_match": [
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      "cve": {
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          "ID": "CVE-2021-46837"
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        "description": {
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              "value": "res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation."
            }
          ]
        },
        "problemtype": {
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                  "value": "CWE-476"
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://downloads.asterisk.org/pub/security/AST-2021-006.html",
              "refsource": "MISC",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://downloads.asterisk.org/pub/security/AST-2021-006.html"
            },
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              "name": "[debian-lts-announce] 20221117 [SECURITY] [DLA 3194-1] asterisk security update",
              "refsource": "MLIST",
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            },
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            }
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        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-01-28T01:20Z",
      "publishedDate": "2022-08-30T07:15Z"
    }
  }
}



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