GLSA 202508-06: Composer: Multiple Vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Composer: Multiple Vulnerabilities
Date:	08/06/2025
Bugs:	#838268
ID:	202508-06

Synopsis

Multiple vulnerabilities have been discovered in Composer, the worst of which can lead to arbitrary code execution.

Background

Composer is a dependency manager for the PHP programming language.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-php/composer	<= 9999		All supported architectures

Description

Integrators using Composer code to call `VcsDriver::getFileContent` can have a code injection vulnerability if the user can control the `$file` or `$identifier` argument. This leads to a vulnerability on packagist.org for example where the composer.json's `readme` field can be used as a vector for injecting parameters into hg/Mercurial via the `$file` argument, or git via the `$identifier` argument if you allow arbitrary data there (Packagist does not, but maybe other integrators do). Composer itself should not be affected by the vulnerability as it does not call `getFileContent` with arbitrary data into `$file`/`$identifier`.

Impact

Please review the referenced CVE identifiers for details.

Workaround

There is no known workaround at this time.

Resolution

Gentoo has discontinued support for composer and the package should be removed:

          # emerge --sync
          # emerge --ask --verbose  --depclean "dev-php/composer"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202508-06.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.