Remote Code Execution via web-accessible composer.phar

{
  "id": "3d22f832b23e89111b0589466f0c19afd2ef25871bb9737d774990a6c4908159",
  "url": "https://osv.dev/vulnerability/CVE-2023-43655",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Remote Code Execution via web-accessible composer.phar",
    "summary": "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.",
    "evidence": "osv:CVE-2023-43655",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-43655",
      "aliases": [
        "BIT-composer-2023-43655",
        "CVE-2023-43655",
        "GHSA-jm6m-4632-36hf"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/composer/composer",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "f8f49191eec76f039b466aa1f161406fe43aff50"
                },
                {
                  "introduced": "378b34c5e33c71d194f33e1b73a62ba22148ff13"
                },
                {
                  "fixed": "978198befc71de0b18fc1fc5a472c03b184b504a"
                },
                {
                  "introduced": "934ee6eed3c3ffd0aeccef7c1d255adcf0752b24"
                },
                {
                  "fixed": "d75d17c16a863438027d1d96401cddcd6aa5bb60"
                },
                {
                  "fixed": "4fce14795aba98e40b6c4f5047305aba17a6120d"
                },
                {
                  "fixed": "955a48e6319c8962e5cd421b07c00ab3c728968c"
                },
                {
                  "fixed": "95e091c921037b7b6564942845e7b738f6b95c9c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:getcomposer:composer:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.10.27"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:getcomposer:composer:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "fixed": "2.2.21"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:getcomposer:composer:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.3.0"
                      },
                      {
                        "fixed": "2.6.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4fce14795aba98e40b6c4f5047305aba17a6120d"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "955a48e6319c8962e5cd421b07c00ab3c728968c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "95e091c921037b7b6564942845e7b738f6b95c9c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.6.3",
            "2.6.2",
            "2.6.1",
            "2.6.0",
            "2.2.20",
            "2.2.19",
            "2.5.2",
            "2.5.1",
            "2.5.0",
            "2.4.1",
            "2.2.18",
            "2.4.0",
            "2.4.0-RC1",
            "2.2.17",
            "2.2.16",
            "2.2.15",
            "2.2.14",
            "2.2.13",
            "2.3.5",
            "2.2.12",
            "1.10.26",
            "2.3.4",
            "2.3.3",
            "2.2.11",
            "2.3.2",
            "2.3.1",
            "2.3.0",
            "2.2.10",
            "2.2.9",
            "2.2.8",
            "2.2.7",
            "2.2.6",
            "1.10.25",
            "2.2.4",
            "2.2.3",
            "2.2.2",
            "2.2.1",
            "2.2.0",
            "1.10.24",
            "2.2.0-RC1",
            "1.0.0-alpha10",
            "1.0.0-alpha9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-43655.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.735589116Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2024/03/msg00030.html",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/66H2WKFUO255T3BZTL72TNYJYH2XM5FG/",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7AWYAUZNH565NWPIKGEIYBWHYNM5JGAE/",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KFOPGPW2KS37O3KJWBRGTUWHTXCQXBS2/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/43xxx/CVE-2023-43655.json",
        "https://github.com/composer/composer/security/advisories/GHSA-jm6m-4632-36hf",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-43655",
        "https://github.com/composer/composer/commit/4fce14795aba98e40b6c4f5047305aba17a6120d",
        "https://github.com/composer/composer/commit/955a48e6319c8962e5cd421b07c00ab3c728968c",
        "https://github.com/composer/composer/commit/95e091c921037b7b6564942845e7b738f6b95c9c"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-74"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.6.4, 2.2.21, 1.10.27"
                  },
                  {
                    "last_affected": "2.6.4, 2.2.21, 1.10.27"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/43xxx/CVE-2023-43655.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-43655",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521187,
  "published_at": "2023-09-29T19:33:32.183+00:00"
}