FKIE_CVE-2015-5400

Vulnerability from fkie_nvd - Published: 2015-09-28 20:59 - Updated: 2026-06-17 00:29
Severity
Summary
Squid before 3.5.6 does not properly handle CONNECT method peer responses when configured with cache_peer, which allows remote attackers to bypass intended restrictions and gain access to a backend proxy via a CONNECT request.
References
cve@mitre.orghttp://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
cve@mitre.orghttp://www.debian.org/security/2015/dsa-3327
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2015/07/06/8
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2015/07/09/12
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2015/07/10/2
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2015/07/17/14Exploit
cve@mitre.orghttp://www.securityfocus.com/bid/75553
cve@mitre.orghttp://www.securitytracker.com/id/1032873
cve@mitre.orghttp://www.squid-cache.org/Advisories/SQUID-2015_2.txtVendor Advisory
cve@mitre.orghttp://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10494.patchExploit, Vendor Advisory
cve@mitre.orghttp://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13225.patchExploit, Vendor Advisory
cve@mitre.orghttp://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13856.patchExploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2015/dsa-3327
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/07/06/8
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/07/09/12
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/07/10/2
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/07/17/14Exploit
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/75553
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1032873
af854a3a-2127-422b-91ae-364da2661108http://www.squid-cache.org/Advisories/SQUID-2015_2.txtVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10494.patchExploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13225.patchExploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13856.patchExploit, Vendor Advisory
Impacted products
Vendor Product Version
fedoraproject fedora 22
debian debian_linux 7.0
debian debian_linux 8.0
squid-cache squid *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*",
              "matchCriteriaId": "253C303A-E577-4488-93E6-68A8DD942C38",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D573DBDF-0CB4-438C-B0B0-11DFD3D8DF7A",
              "versionEndIncluding": "3.5.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Squid before 3.5.6 does not properly handle CONNECT method peer responses when configured with cache_peer, which allows remote attackers to bypass intended restrictions and gain access to a backend proxy via a CONNECT request."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad en Squid en versiones anteriores a 3.5.6, no maneja adecuadamente las respuestas de pares del m\u00e9todo CONNECT cuando se configura con cache_peer, lo que permite a atacantes remotos eludir las restricciones previstas y obtener acceso a un proxy backend a trav\u00e9s de una solicitud CONNECT."
    }
  ],
  "id": "CVE-2015-5400",
  "lastModified": "2026-06-17T00:29:04.243",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ]
  },
  "published": "2015-09-28T20:59:03.280",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.debian.org/security/2015/dsa-3327"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.openwall.com/lists/oss-security/2015/07/06/8"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.openwall.com/lists/oss-security/2015/07/09/12"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.openwall.com/lists/oss-security/2015/07/10/2"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2015/07/17/14"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.securityfocus.com/bid/75553"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.securitytracker.com/id/1032873"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Advisories/SQUID-2015_2.txt"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10494.patch"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13225.patch"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13856.patch"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.debian.org/security/2015/dsa-3327"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2015/07/06/8"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2015/07/09/12"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2015/07/10/2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2015/07/17/14"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securityfocus.com/bid/75553"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securitytracker.com/id/1032873"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Advisories/SQUID-2015_2.txt"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10494.patch"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13225.patch"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13856.patch"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-264"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.