CVE-2023-43655

unknown

Published 2023-09-29 · Modified 2025-02-13

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CVSS v3

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CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v4 NEW

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not yet in upstream

VIR risk

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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.

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Mixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`2.6.4-1`
sid	Fixed	`2.6.4-1`
forky	Fixed	`2.6.4-1`
bullseye	Affected	—
bookworm	Fixed	`2.5.5-1+deb12u4`

Package impact

Ecosystem	Package	Vulnerable	Fixed
Packagist	composer/composer	`<1.10.27`	`1.10.27`
Packagist	composer/composer	`>=2.0.0,<2.2.22`	`2.2.22`
Packagist	composer/composer	`>=2.3.0,<2.6.4`	`2.6.4`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.