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CVE-2016-2167

Estado: ModificadaMedia (6.8)—

The canonicalize_username function in svnserve/cyrus_auth.c in Apache Subversion before 1.8.16 and 1.9.x before 1.9.4, when Cyrus SASL authentication is used, allows remote attackers to authenticate and bypass intended access restrictions via a realm string that is a prefix of an expected repository realm string.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Apache — Subversion

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2016-2167",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.9,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 6.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2016-05-05T18:59:00.117",
  "references": [
    {
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184545.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00043.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00044.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA%40mail.gmail.com%3E",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ%40mail.gmail.com%3E",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://subversion.apache.org/security/CVE-2016-2167-advisory.txt",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.debian.org/security/2016/dsa-3561",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/89417",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.securitytracker.com/id/1035706",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.417496",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://security.gentoo.org/glsa/201610-05",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.oracle.com/security-alerts/cpuoct2020.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184545.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00043.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00044.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgJet+7_MAhomFVOXPgLtewcUw9w=k9zdPCkq5tvPxVMA%40mail.gmail.com%3E",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://mail-archives.apache.org/mod_mbox/subversion-announce/201604.mbox/%3CCAP_GPNgfn1iKueW51EpmXzXi_URNfGNofZSgOyW1_jnSeNm5DQ%40mail.gmail.com%3E",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://subversion.apache.org/security/CVE-2016-2167-advisory.txt",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2016/dsa-3561",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/89417",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1035706",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.417496",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.gentoo.org/glsa/201610-05",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.oracle.com/security-alerts/cpuoct2020.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The canonicalize_username function in svnserve/cyrus_auth.c in Apache Subversion before 1.8.16 and 1.9.x before 1.9.4, when Cyrus SASL authentication is used, allows remote attackers to authenticate and bypass intended access restrictions via a realm string that is a prefix of an expected repository realm string."
    },
    {
      "lang": "es",
      "value": "La función canonicalize_username en svnserve/cyrus_auth.c en Apache Subversion en versiones anteriores a 1.8.16 y 1.9.x en versiones anteriores a 1.9.4, cuando se utiliza autenticación Cyrus SASL, permite a atacantes remotos autenticarse y eludir restricciones destinadas al acceso a través de una cadena realm que se prefija a un repositorio de cadena realm esperado."
    }
  ],
  "lastModified": "2026-06-17T00:43:34.313",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:subversion:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DD9BA15E-397D-4B1F-B755-8FFBBF58AE59",
              "versionEndIncluding": "1.8.15"
            },
            {
              "criteria": "cpe:2.3:a:apache:subversion:1.9.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "892FF423-1848-4E69-8C4C-E1972B656196"
            },
            {
              "criteria": "cpe:2.3:a:apache:subversion:1.9.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9ACF37C7-8752-4A8F-B7E3-2E813C4A0DF0"
            },
            {
              "criteria": "cpe:2.3:a:apache:subversion:1.9.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "74200C33-9505-48EB-964D-6CA28C7F6DB8"
            },
            {
              "criteria": "cpe:2.3:a:apache:subversion:1.9.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "09FBAFE7-986D-4B24-8122-FDCC380331C9"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}