FKIE_CVE-2020-12049

Vulnerability from fkie_nvd - Published: 2020-06-08 17:15 - Updated: 2026-06-17 02:51
Summary
An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients.
References
cve@mitre.orghttp://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2020/06/04/3Mailing List, Patch, Third Party Advisory
cve@mitre.orghttps://gitlab.freedesktop.org/dbus/dbus/-/issues/294Exploit, Third Party Advisory
cve@mitre.orghttps://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.10.30Third Party Advisory
cve@mitre.orghttps://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.12.18Third Party Advisory
cve@mitre.orghttps://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.13.16Third Party Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/202007-46Third Party Advisory
cve@mitre.orghttps://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leakExploit, Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/4398-1/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/4398-2/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/06/04/3Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://gitlab.freedesktop.org/dbus/dbus/-/issues/294Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.10.30Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.12.18Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.13.16Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202007-46Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leakExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4398-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4398-2/Third Party Advisory
Impacted products

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4DAA98B8-A6E1-4233-9A80-7963ED2FBC01",
              "versionEndExcluding": "1.12.18",
              "versionStartIncluding": "1.3.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:*:*:*:*",
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              "vulnerable": true
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              "vulnerable": true
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          ],
          "negate": false,
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in dbus \u003e= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service\u0027s private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en dbus versiones posteriores a 1.3.0 e incluy\u00e9ndola y anteriores a 1.12.18. El DBusServer en libdbus, como es usado en dbus-daemon, filtra los descriptores de archivo cuando un mensaje excede el l\u00edmite del descriptor de archivo por mensaje. Un atacante local con acceso al bus del sistema D-Bus o al socket AF_UNIX privado de otro servicio del sistema podr\u00eda utilizar esto para hacer que el servicio del sistema alcance su l\u00edmite del descriptor de archivos, negando el servicio a los clientes posteriores de D-Bus"
    }
  ],
  "id": "CVE-2020-12049",
  "lastModified": "2026-06-17T02:51:20.643",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 4.9,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-06-08T17:15:09.910",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html"
    },
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    },
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-404"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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