CVE-2023-43655

Publication date 29 September 2023

Last updated 2 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.4 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
composer 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.04 LTS jammy
Fixed 2.2.6-2ubuntu4+esm1
20.04 LTS focal
Fixed 1.10.1-1ubuntu0.1~esm2
18.04 LTS bionic
Fixed 1.6.3-1ubuntu0.1~esm2
16.04 LTS xenial
Fixed 1.0.0~beta2-1ubuntu0.1~esm2
14.04 LTS trusty Ignored end of standard support

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Severity score breakdown

Parameter Value
Base score 6.4 · Medium
Attack vector Network
Attack complexity High
Privileges required High
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H