ubuntu-cve-2023-43655
Vulnerability from osv_ubuntu
Published
2023-09-29 20:15
Modified
2025-10-24 05:02
Summary
Details

Composer is a dependency manager for PHP. Users publishing a composer.phar to a public web-accessible server where the composer.phar can be executed as a php file may be subject to a remote code execution vulnerability if PHP also has register_argc_argv enabled in php.ini. Versions 2.6.4, 2.2.22 and 1.10.27 patch this vulnerability. Users are advised to upgrade. Users unable to upgrade should make sure register_argc_argv is disabled in php.ini, and avoid publishing composer.phar to the web as this is not best practice.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "composer",
            "binary_version": "1.0.0~beta2-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "composer",
        "purl": "pkg:deb/ubuntu/composer@1.0.0~beta2-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.0~beta2-1ubuntu0.1~esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0~alpha10+20150602-1",
        "1.0.0~alpha10+20150602-2",
        "1.0.0~alpha11-1",
        "1.0.0~alpha11-1ubuntu1",
        "1.0.0~alpha11-2",
        "1.0.0~alpha11-3",
        "1.0.0~beta1-1ubuntu1",
        "1.0.0~beta2-1",
        "1.0.0~beta2-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "composer",
            "binary_version": "1.6.3-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "composer",
        "purl": "pkg:deb/ubuntu/composer@1.6.3-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.3-1ubuntu0.1~esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.1-1",
        "1.5.2-1",
        "1.6.2-1",
        "1.6.3-1",
        "1.6.3-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "composer",
            "binary_version": "1.10.1-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "composer",
        "purl": "pkg:deb/ubuntu/composer@1.10.1-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.1-1ubuntu0.1~esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.0-2",
        "1.9.1-1",
        "1.9.2-1",
        "1.9.3-1",
        "1.10.0-1",
        "1.10.1-1",
        "1.10.1-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "composer",
            "binary_version": "2.2.6-2ubuntu4+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "composer",
        "purl": "pkg:deb/ubuntu/composer@2.2.6-2ubuntu4+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.6-2ubuntu4+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.9-2ubuntu2",
        "2.0.9-2ubuntu3",
        "2.0.13-1ubuntu1",
        "2.1.12-1ubuntu1",
        "2.2.6-2ubuntu4"
      ]
    }
  ],
  "aliases": [],
  "details": "Composer is a dependency manager for PHP. Users publishing a composer.phar to a public web-accessible server where the composer.phar can be executed as a php file may be subject to a remote code execution vulnerability if PHP also has `register_argc_argv` enabled in php.ini. Versions 2.6.4, 2.2.22 and 1.10.27 patch this vulnerability. Users are advised to upgrade. Users unable to upgrade should make sure `register_argc_argv` is disabled in php.ini, and avoid publishing composer.phar to the web as this is not best practice.",
  "id": "UBUNTU-CVE-2023-43655",
  "modified": "2025-10-24T05:02:17Z",
  "published": "2023-09-29T20:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-43655"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/composer/composer/security/advisories/GHSA-jm6m-4632-36hf"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/composer/composer/commit/4fce14795aba98e40b6c4f5047305aba17a6120d"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/composer/composer/commit/95e091c921037b7b6564942845e7b738f6b95c9c"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/composer/composer/commit/955a48e6319c8962e5cd421b07c00ab3c728968c"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/composer/composer/commit/955a48e6319c8962e5cd421b07c00ab3c728968c"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/composer/composer/commit/95e091c921037b7b6564942845e7b738f6b95c9c"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/composer/composer/commit/4fce14795aba98e40b6c4f5047305aba17a6120d"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-43655"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7603-1"
    }
  ],
  "related": [
    "USN-7603-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-43655"
  ]
}



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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.


Detection rules are retrieved from Rulezet.