github - ghsa-gx26-q49r-m7g8

GHSA-GX26-Q49R-M7G8

Vulnerability from github – Published: 2022-05-24 17:14 – Updated: 2022-05-24 17:14

Details

An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-12520"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-04-15T20:15:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker\u0027s HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI.",
  "id": "GHSA-gx26-q49r-m7g8",
  "modified": "2022-05-24T17:14:19Z",
  "published": "2022-05-24T17:14:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-12520"
    },
    {
      "type": "WEB",
      "url": "https://github.com/squid-cache/squid/commits/v4"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12520.txt"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20210205-0006"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4446-1"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2020/dsa-4682"
    },
    {
      "type": "WEB",
      "url": "http://www.squid-cache.org/Versions/v4"
    },
    {
      "type": "WEB",
      "url": "http://www.squid-cache.org/Versions/v4/changesets"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2019-12520 (GCVE-0-2019-12520)

Vulnerability from cvelistv5 – Published: 2020-04-15 19:14 – Updated: 2024-08-04 23:24

Summary

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	http://www.squid-cache.org/Versions/v4/	x_refsource_MISC
	http://www.squid-cache.org/Versions/v4/changesets/	x_refsource_MISC
	https://github.com/squid-cache/squid/commits/v4	x_refsource_MISC
	https://gitlab.com/jeriko.one/security/-/blob/mas…	x_refsource_MISC
	https://www.debian.org/security/2020/dsa-4682	vendor-advisoryx_refsource_DEBIAN
	https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
	https://usn.ubuntu.com/4446-1/	vendor-advisoryx_refsource_UBUNTU
	https://security.netapp.com/advisory/ntap-2021020…	x_refsource_CONFIRM

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T23:24:38.487Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://www.squid-cache.org/Versions/v4/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://www.squid-cache.org/Versions/v4/changesets/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/squid-cache/squid/commits/v4"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12520.txt"
          },
          {
            "name": "DSA-4682",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4682"
          },
          {
            "name": "[debian-lts-announce] 20200710 [SECURITY] [DLA 2278-1] squid3 security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html"
          },
          {
            "name": "USN-4446-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4446-1/"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210205-0006/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker\u0027s HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2021-02-05T11:06:17",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://www.squid-cache.org/Versions/v4/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://www.squid-cache.org/Versions/v4/changesets/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/commits/v4"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12520.txt"
        },
        {
          "name": "DSA-4682",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2020/dsa-4682"
        },
        {
          "name": "[debian-lts-announce] 20200710 [SECURITY] [DLA 2278-1] squid3 security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html"
        },
        {
          "name": "USN-4446-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4446-1/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210205-0006/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2019-12520",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker\u0027s HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "http://www.squid-cache.org/Versions/v4/",
              "refsource": "MISC",
              "url": "http://www.squid-cache.org/Versions/v4/"
            },
            {
              "name": "http://www.squid-cache.org/Versions/v4/changesets/",
              "refsource": "MISC",
              "url": "http://www.squid-cache.org/Versions/v4/changesets/"
            },
            {
              "name": "https://github.com/squid-cache/squid/commits/v4",
              "refsource": "MISC",
              "url": "https://github.com/squid-cache/squid/commits/v4"
            },
            {
              "name": "https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12520.txt",
              "refsource": "MISC",
              "url": "https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12520.txt"
            },
            {
              "name": "DSA-4682",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2020/dsa-4682"
            },
            {
              "name": "[debian-lts-announce] 20200710 [SECURITY] [DLA 2278-1] squid3 security update",
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              "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html"
            },
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              "name": "USN-4446-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4446-1/"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210205-0006/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210205-0006/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-12520",
    "datePublished": "2020-04-15T19:14:25",
    "dateReserved": "2019-06-02T00:00:00",
    "dateUpdated": "2024-08-04T23:24:38.487Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-GX26-Q49R-M7G8

CVE-2019-12520 (GCVE-0-2019-12520)

Tags

Sightings

Nomenclature