CVE-2023-43655
Remote Code Execution via web-accessible composer.phar
- State
- Published
- Severity
- 6.4 Medium
- Published
- Sep 29, 2023
- Updated
- Jun 18, 2025
- Reserved
- Sep 20, 2023
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Affected Products
| Product | Versions |
|---|---|
composercomposer |
|
References
- https://github.com/composer/composer/security/advisories/GHSA-jm6m-4632-36hf
- https://github.com/composer/composer/commit/4fce14795aba98e40b6c4f5047305aba17a6120d
- https://github.com/composer/composer/commit/955a48e6319c8962e5cd421b07c00ab3c728968c
- https://github.com/composer/composer/commit/95e091c921037b7b6564942845e7b738f6b95c9c
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KFOPGPW2KS37O3KJWBRGTUWHTXCQXBS2/
- 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/66H2WKFUO255T3BZTL72TNYJYH2XM5FG/
- https://lists.debian.org/debian-lts-announce/2024/03/msg00030.html
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