CVE-2023-43655: Remote Code Execution via web-accessible composer.phar
First published: Fri Sep 29 2023(Updated: )
### Impact Users publishing a composer.phar to a public web-accessible server where the composer.phar can be executed as a php file may be impacted if PHP also has `register_argc_argv` enabled in php.ini. ### Patches 2.6.4, 2.2.22 and 1.10.27 patch this vulnerability. ### Workarounds Make sure `register_argc_argv` is disabled in php.ini, and avoid publishing composer.phar to the web as this really should not happen.
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Getcomposer Composer | <1.10.27 | |
| Getcomposer Composer | >=2.0.0<2.2.21 | |
| Getcomposer Composer | >=2.3.0<2.6.4 | |
| Fedoraproject Fedora | =37 | |
| Fedoraproject Fedora | =38 |
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Reference Links
- https://github.com/composer/composer/commit/4fce14795aba98e40b6c4f5047305aba17a6120d
- https://github.com/composer/composer/commit/955a48e6319c8962e5cd421b07c00ab3c728968c
- https://github.com/composer/composer/commit/95e091c921037b7b6564942845e7b738f6b95c9c
- https://github.com/composer/composer/security/advisories/GHSA-jm6m-4632-36hf
- 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://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/66H2WKFUO255T3BZTL72TNYJYH2XM5FG/
- https://nvd.nist.gov/vuln/detail/CVE-2023-43655
- https://github.com/advisories/GHSA-jm6m-4632-36hf (Advisory)
- 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
Frequently Asked Questions
What is the impact of CVE-2023-43655?
Users publishing a composer.phar to a public web-accessible server where the composer.phar can be executed as a PHP file may be impacted if PHP also has register_argc_argv enabled in php.ini.
How can I patch CVE-2023-43655?
You can patch this vulnerability by updating Composer to version 2.6.4, 2.2.22, or 1.10.27.
Are there any workarounds for CVE-2023-43655?
To mitigate this vulnerability, ensure that register_argc_argv is disabled in php.ini or restrict access to the composer.phar file.
What is the severity of CVE-2023-43655?
The severity of this vulnerability is medium with a CVSS score of 6.4.
Where can I find more information about CVE-2023-43655?
You can find more information about CVE-2023-43655 in the following references: - [GitHub Security Advisory](https://github.com/composer/composer/security/advisories/GHSA-jm6m-4632-36hf) - [GitHub Commit 1](https://github.com/composer/composer/commit/4fce14795aba98e40b6c4f5047305aba17a6120d) - [GitHub Commit 2](https://github.com/composer/composer/commit/955a48e6319c8962e5cd421b07c00ab3c728968c)
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