ubuntu-cve-2023-49288
Vulnerability from osv_ubuntu
Published
2023-12-04 23:15
Modified
2025-11-05 05:00
Summary
Details

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsed_forwarding on" are vulnerable. Configurations with "collapsed_forwarding off" or without a "collapsed_forwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.

Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid3",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "squid3",
        "purl": "pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.16+esm6?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3.8-1ubuntu16",
        "3.3.8-1ubuntu17",
        "3.5.12-1ubuntu6",
        "3.5.12-1ubuntu7",
        "3.5.12-1ubuntu7.1",
        "3.5.12-1ubuntu7.2",
        "3.5.12-1ubuntu7.3",
        "3.5.12-1ubuntu7.4",
        "3.5.12-1ubuntu7.5",
        "3.5.12-1ubuntu7.6",
        "3.5.12-1ubuntu7.7",
        "3.5.12-1ubuntu7.8",
        "3.5.12-1ubuntu7.9",
        "3.5.12-1ubuntu7.10",
        "3.5.12-1ubuntu7.11",
        "3.5.12-1ubuntu7.12",
        "3.5.12-1ubuntu7.13",
        "3.5.12-1ubuntu7.14",
        "3.5.12-1ubuntu7.15",
        "3.5.12-1ubuntu7.16",
        "3.5.12-1ubuntu7.16+esm1",
        "3.5.12-1ubuntu7.16+esm2",
        "3.5.12-1ubuntu7.16+esm3",
        "3.5.12-1ubuntu7.16+esm4",
        "3.5.12-1ubuntu7.16+esm5",
        "3.5.12-1ubuntu7.16+esm6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid3",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "squid3",
        "purl": "pkg:deb/ubuntu/squid3@3.5.27-1ubuntu1.14+esm5?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.5.23-5ubuntu1",
        "3.5.23-5ubuntu2",
        "3.5.27-1ubuntu1",
        "3.5.27-1ubuntu1.1",
        "3.5.27-1ubuntu1.2",
        "3.5.27-1ubuntu1.3",
        "3.5.27-1ubuntu1.4",
        "3.5.27-1ubuntu1.5",
        "3.5.27-1ubuntu1.6",
        "3.5.27-1ubuntu1.7",
        "3.5.27-1ubuntu1.8",
        "3.5.27-1ubuntu1.9",
        "3.5.27-1ubuntu1.10",
        "3.5.27-1ubuntu1.11",
        "3.5.27-1ubuntu1.12",
        "3.5.27-1ubuntu1.13",
        "3.5.27-1ubuntu1.14",
        "3.5.27-1ubuntu1.14+esm1",
        "3.5.27-1ubuntu1.14+esm2",
        "3.5.27-1ubuntu1.14+esm3",
        "3.5.27-1ubuntu1.14+esm4",
        "3.5.27-1ubuntu1.14+esm5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "4.10-1ubuntu1.12"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "4.10-1ubuntu1.12"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "4.10-1ubuntu1.12"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "4.10-1ubuntu1.12"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "4.10-1ubuntu1.12"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@4.10-1ubuntu1.12?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.10-1ubuntu1.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.8-1ubuntu2",
        "4.8-1ubuntu3",
        "4.9-2ubuntu1",
        "4.9-2ubuntu2",
        "4.9-2ubuntu3",
        "4.9-2ubuntu4",
        "4.10-1ubuntu1",
        "4.10-1ubuntu1.1",
        "4.10-1ubuntu1.2",
        "4.10-1ubuntu1.3",
        "4.10-1ubuntu1.4",
        "4.10-1ubuntu1.5",
        "4.10-1ubuntu1.6",
        "4.10-1ubuntu1.7",
        "4.10-1ubuntu1.8",
        "4.10-1ubuntu1.9",
        "4.10-1ubuntu1.10",
        "4.10-1ubuntu1.11"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "5.7-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "5.7-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "5.7-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "5.7-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "5.7-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "5.7-0ubuntu0.22.04.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@5.7-0ubuntu0.22.04.4?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.7-0ubuntu0.22.04.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.13-10ubuntu5",
        "5.2-1ubuntu1",
        "5.2-1ubuntu3",
        "5.2-1ubuntu4",
        "5.2-1ubuntu4.1",
        "5.2-1ubuntu4.2",
        "5.2-1ubuntu4.3",
        "5.7-0ubuntu0.22.04.1",
        "5.7-0ubuntu0.22.04.2",
        "5.7-0ubuntu0.22.04.3"
      ]
    }
  ],
  "aliases": [],
  "details": "Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with \"collapsed_forwarding on\" are vulnerable. Configurations with \"collapsed_forwarding off\" or without a \"collapsed_forwarding\" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.",
  "id": "UBUNTU-CVE-2023-49288",
  "modified": "2025-11-05T05:00:24Z",
  "published": "2023-12-04T23:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-49288"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-rj5h-46j6-q2g5"
    },
    {
      "type": "REPORT",
      "url": "https://megamansec.github.io/Squid-Security-Audit/trace-uaf.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6728-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6728-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-49288"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6728-3"
    }
  ],
  "related": [
    "USN-6728-1",
    "USN-6728-2",
    "USN-6728-3"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-49288"
  ]
}



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Sightings

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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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • 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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