Composer: Multiple security vulnerabilities
Composer contains multiple vulnerabilities allowing remote, anonymous attackers to bypass security controls, manipulate files, or perform unauthorized information disclosure.
Triage facts
Revision 1- Applicability
- Composer
- Evidence
- Unknown
- Severity
- Medium
- Action
- Elevated
- Sources
- 1 public source
- Freshness
- Revision 1Oct 30, 15:06 UTC
- Source quality
- A5Roughly even chance
The dependency manager for PHP, Composer, is affected by multiple vulnerabilities. Remote, anonymous attackers can exploit these flaws to bypass security measures, manipulate files, or access sensitive information. No specific CVE identifiers were provided in the initial security advisory. Users are encouraged to monitor vendor update channels for patches addressing these issues.
Recommendation
- Inventory all systems where Composer is installed, including development environments, build servers, and CI/CD pipelines.
- Monitor the official Composer GitHub repository and project website for forthcoming releases and patches.
- Upgrade Composer to the latest stable version as soon as a security update is released to address these vulnerabilities.
- Review directory permissions and isolation settings for automated build processes that utilize Composer to minimize the impact of potential file manipulation.
Immediate actions
Inventory all servers and build agents running Composer.
Threat Hunt
Audit build logs for unexpected dependencies or unauthorized configuration file changes during the `composer install` or `composer update` process.
Data: Build server logs, Filesystem monitoring on CI/CD nodes
Enrichment needed
- Composer security patch release (CTI) Need specific version numbers to verify remediation.
Mitigations
Upgrade Composer to the latest version immediately upon the release of a security patch.
General vulnerabilities in Composer
Gaps
- Missing version numbers and CVE identifiers prevent targeted patching.