CVE-2023-43655

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.

How to fix CVE-2023-43655

To remediate CVE-2023-43655, upgrade the affected package to a fixed version below.

• —upgrade to 1.10.27 or later
• —no fix listed
• —upgrade to 1.8.4-1+deb10u3 or later
• —upgrade to 1.10.27 or later

Is CVE-2023-43655 being exploited?

Low — EPSS is 1.6%, meaning exploitation activity has not been observed at scale.

Affected packages (4)

• from 0, < 1.10.27, >= 2.0.0, < 2.2.21, >= 2.3.0, < 2.6.4
• from 0
• from 0, < 1.8.4-1+deb10u3
• from 0, < 1.10.27

CVSS scores

References (14)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-43655
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2023-43655
• PATCHgithub.com/composer/composer
• WEBgithub.com/composer/composer/commit/4fce14795aba98e40b6c4f5047305aba17a6120d