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CVE-2015-5400 (GCVE-0-2015-5400)

Vulnerability from cvelistv5 – Published: 2015-09-28 20:00 – Updated: 2024-08-06 06:50
VLAI
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.
Severity
No CVSS data available.
CWE
  • n/a
Date Public
2015-07-06 00:00
Show details on NVD website

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          "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"
        }
      ]
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*",
                    "matchCriteriaId": "253C303A-E577-4488-93E6-68A8DD942C38",
                    "vulnerable": true
                  }
                ],
                "negate": false,
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              }
            ]
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                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
                    "vulnerable": true
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                ],
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              {
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                    "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": "2026-05-06T22:30:45.220",
        "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": [
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            ],
            "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",
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          },
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          },
          {
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          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
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          },
          {
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            "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"
          },
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          },
          {
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          },
          {
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            ],
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          },
          {
            "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": [
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          },
          {
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          },
          {
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              "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"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-19T09:38:13+00:00",
      "cve": "CVE-2015-5400",
      "id": "CVE-2015-5400",
      "initial_release_date": "2015-07-06T00:00:00+00:00",
      "product_status:known_affected": "7",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "squid: information disclosure due to incorrect handling of peer responses in tunnel.cc (SQUID-2015:2)",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2015/cve-2015-5400.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T02:28:21Z",
      "cve": "CVE-2015-5400",
      "id": "CVE-2015-5400",
      "initial_release_date": "2023-02-15T05:16:03Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "62",
      "product_status:recommended": "59",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2015-5400",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2015-5400.json",
      "version": "48"
    }
  }
}



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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.

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Detection rules are retrieved from Rulezet.

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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.


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