FKIE_CVE-2023-49786

Vulnerability from fkie_nvd - Published: 2023-12-14 20:15 - Updated: 2024-11-21 08:33
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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. 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.
References
security-advisories@github.comhttp://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
security-advisories@github.comhttp://seclists.org/fulldisclosure/2023/Dec/24Exploit, Mailing List, Third Party Advisory
security-advisories@github.comhttp://www.openwall.com/lists/oss-security/2023/12/15/7Exploit, Mailing List
security-advisories@github.comhttps://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-raceExploit
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05Patch
security-advisories@github.comhttps://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pqExploit, Vendor Advisory
security-advisories@github.comhttps://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Dec/24Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/12/15/7Exploit, Mailing List
af854a3a-2127-422b-91ae-364da2661108https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-raceExploit
af854a3a-2127-422b-91ae-364da2661108https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pqExploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
Impacted products
Vendor Product Version
digium asterisk *
digium asterisk *
digium asterisk 21.0.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 13.13.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 16.8.0
sangoma certified_asterisk 18.9
sangoma certified_asterisk 18.9
sangoma certified_asterisk 18.9
sangoma certified_asterisk 18.9
sangoma certified_asterisk 18.9
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
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  ],
  "cveTags": [],
  "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": "2024-11-21T08:33:50.533",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "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": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2023-12-14T20:15:52.927",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
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      "url": "http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.html"
    },
    {
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    },
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    },
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      "url": "https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05"
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    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html"
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  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-703"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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