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ComposerApplication · Getcomposer

CVE-2024-24821

HIGH · 7.8 CVSS v3.1 Published 2024-02-09
Fix available
A fix is available. Upgrade to 2.2.23 / 2.7.0 or later.
See remediation →
80/100
Remediation priority · High
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Composer is a dependency Manager for the PHP language. In affected versions several files within the local working directory are included during the invocation of Composer and in the context of the executing user. As such, under certain conditions arbitrary code execution may lead to local privilege escalation, provide lateral user movement or malicious code execution when Composer is invoked within a directory with tampered files. All Composer CLI commands are affected, including composer.phar's self-update. The following scenarios are of high risk: Composer being run with sudo, Pipelines which may execute Composer on untrusted projects, Shared environments with developers who run Composer individually on the same project. This vulnerability has been addressed in versions 2.7.0 and 2.2.23. It is advised that the patched versions are applied at the earliest convenience. Where not possible, the following should be addressed: Remove all sudo composer privileges for all users to mitigate root privilege escalation, and avoid running Composer within an untrusted directory, or if needed, verify that the contents of `vendor/composer/InstalledVersions.php` and `vendor/composer/installed.php` do not include untrusted code. A reset can also be done on these files by the following:```sh rm vendor/composer/installed.php vendor/composer/InstalledVersions.php composer install --no-scripts --no-plugins ```

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
ComposerApplication
Affected:>= 2.0.0, < 2.2.23>= 2.3.0, < 2.7.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.2.23 / 2.7.0 or later
Fixed in 2.2.232.7.0
Vendor patch github.com →
Recommended fix High confidence

Composer 2.7.0 (or Composer 2.2.23 for the 2.2 LTS branch)

  1. Identify your current Composer version by running `composer --version`
  2. If running Composer 2.0.0 through 2.2.22, upgrade to version 2.2.23
  3. If running Composer 2.3.0 through 2.6.x, upgrade to version 2.7.0
  4. Upgrade Composer by running: `composer self-update 2.7.0` (or `composer self-update 2.2.23` for the 2.2 branch)
  5. Alternatively, download the new version from https://getcomposer.org/download/
  6. Verify the upgrade was successful by running `composer --version`
  7. As an additional precaution, reset vendor files if operating in untrusted environments: `rm vendor/composer/installed.php vendor/composer/InstalledVersions.php && composer install --no-scripts --no-plugins`
Caveat Review Composer 2.7.0 release notes for any changes to plugins, scripts, or dependency resolution behavior that may affect your projects

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-24821 in production — separate from our analysis above.

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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