gsd-2023-49786
Vulnerability from gsd
Modified
2023-12-13 01:20
Details
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6.
Aliases
Aliases
CVE-2023-49786


To clipboard 

{
  "GSD": {
    "alias": "CVE-2023-49786",
    "id": "GSD-2023-49786"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-49786"
      ],
      "details": "Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6.",
      "id": "GSD-2023-49786",
      "modified": "2023-12-13T01:20:35.215681Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2023-49786",
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        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6."
          },
          {
            "lang": "es",
            "value": "Asterisk es un conjunto de herramientas de telefon\u00eda y centralita privada de c\u00f3digo abierto. En Asterisk anteriores a las versiones 18.20.1, 20.5.1 y 21.0.1; as\u00ed como certificado-asterisco anterior a 18.9-cert6; Asterisk es susceptible a un DoS debido a una condici\u00f3n de ejecuci\u00f3n en la fase \"hello handshake\" del protocolo DTLS cuando maneja DTLS-SRTP para la configuraci\u00f3n de medios. Este ataque se puede realizar de forma continua, negando as\u00ed nuevas llamadas cifradas DTLS-SRTP durante el ataque. El abuso de esta vulnerabilidad puede provocar una denegaci\u00f3n de servicio masiva en servidores Asterisk vulnerables para llamadas que dependen de DTLS-SRTP. El commit d7d7764cb07c8a1872804321302ef93bf62cba05 contiene una soluci\u00f3n, que forma parte de las versiones 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6."
          }
        ],
        "id": "CVE-2023-49786",
        "lastModified": "2023-12-29T00:15:50.043",
        "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",
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            {
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                "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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              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2023-12-14T20:15:52.927",
        "references": [
          {
            "source": "security-advisories@github.com",
            "tags": [
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              "Third Party Advisory",
              "VDB Entry"
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          {
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            "tags": [
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              "Mailing List",
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            "tags": [
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              "Mailing List"
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            "tags": [
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            "url": "https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race"
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            "tags": [
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            "url": "https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05"
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          {
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            "tags": [
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              "Vendor Advisory"
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            "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pq"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-362"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
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                "lang": "en",
                "value": "CWE-703"
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            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}


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