fkie_cve-2024-42491
Vulnerability from fkie_nvd
Published
2024-09-05 18:15
Modified
2025-08-26 17:47
Severity ?
5.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Summary
Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.24.3, 20.9.3, and 21.4.3 of Asterisk and versions 18.9-cert12 and 20.7-cert2 of certified-asterisk, if Asterisk attempts to send a SIP request to a URI whose host portion starts with `.1` or `[.1]`, and res_resolver_unbound is loaded, Asterisk will crash with a SEGV. To receive a patch, users should upgrade to one of the following versions: 18.24.3, 20.9.3, 21.4.3, certified-18.9-cert12, certified-20.7-cert2. Two workarounds are available. Disable res_resolver_unbound by setting `noload = res_resolver_unbound.so` in modules.conf, or set `rewrite_contact = yes` on all PJSIP endpoints. NOTE: This may not be appropriate for all Asterisk configurations.
References
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/42a2f4ccfa2c7062a15063e765916b3332e34cc4Patch
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/4f01669c7c41c9184f3cce9a3cf1b2ebf6201742Patch
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/50bf8d4d3064930d28ecf1ce3397b14574d514d2Patch
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/7a0090325bfa9d778a39ae5f7d0a98109e4651c8Patch
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0Patch
security-advisories@github.comhttps://github.com/asterisk/asterisk/security/advisories/GHSA-v428-g3cw-7hv9Vendor Advisory
Impacted products
Vendor Product Version
sangoma asterisk *
sangoma asterisk *
sangoma asterisk *
sangoma certified_asterisk *
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
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
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
sangoma certified_asterisk 20.7
sangoma certified_asterisk 20.7
sangoma certified_asterisk 20.7
sangoma certified_asterisk 20.7


To clipboard 

{
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.24.3, 20.9.3, and 21.4.3 of Asterisk and versions 18.9-cert12 and 20.7-cert2 of certified-asterisk, if Asterisk attempts to send a SIP request to a URI whose host portion starts with `.1` or `[.1]`, and res_resolver_unbound is loaded, Asterisk will crash with a SEGV. To receive a patch, users should upgrade to one of the following versions: 18.24.3, 20.9.3, 21.4.3, certified-18.9-cert12, certified-20.7-cert2. Two workarounds are available. Disable res_resolver_unbound by setting `noload = res_resolver_unbound.so` in modules.conf, or set `rewrite_contact = yes` on all PJSIP endpoints. NOTE: This may not be appropriate for all Asterisk configurations."
    },
    {
      "lang": "es",
      "value": "Asterisk es una centralita privada (PBX) de c\u00f3digo abierto. En versiones anteriores a las 18.24.3, 20.9.3 y 21.4.3 de Asterisk y las versiones 18.9-cert12 y 20.7-cert2 de certificate-asterisk, si Asterisk intenta enviar una solicitud SIP a una URI cuya parte de host comienza con `.1` o `[.1]`, y res_resolver_unbound est\u00e1 cargado, Asterisk se bloquear\u00e1 con un SEGV. Para recibir un parche, los usuarios deben actualizar a una de las siguientes versiones: 18.24.3, 20.9.3, 21.4.3, certificate-18.9-cert12, certificate-20.7-cert2. Hay dos workarounds disponibles. Deshabilite res_resolver_unbound configurando `noload = res_resolver_unbound.so` en modules.conf, o configure `rewrite_contact = yes` en todos los endpoints PJSIP. NOTA: Esto puede no ser apropiado para todas las configuraciones de Asterisk."
    }
  ],
  "id": "CVE-2024-42491",
  "lastModified": "2025-08-26T17:47:36.190",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2024-09-05T18:15:05.707",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/asterisk/asterisk/commit/42a2f4ccfa2c7062a15063e765916b3332e34cc4"
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      "tags": [
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      "tags": [
        "Patch"
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      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-v428-g3cw-7hv9"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-252"
        },
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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