CVE-2021-29472

 

Published at: - 27-04-2021 11:15

Last modified: - 02-08-2022 05:15

Total changes: - 7

Description

Composer is a dependency manager for PHP. URLs for Mercurial repositories in the root composer.json and package source download URLs are not sanitized correctly. Specifically crafted URL values allow code to be executed in the HgDriver if hg/Mercurial is installed on the system. The impact to Composer users directly is limited as the composer.json file is typically under their own control and source download URLs can only be supplied by third party Composer repositories they explicitly trust to download and execute source code from, e.g. Composer plugins. The main impact is to services passing user input to Composer, including Packagist.org and Private Packagist. This allowed users to trigger remote code execution. The vulnerability has been patched on Packagist.org and Private Packagist within 12h of receiving the initial vulnerability report and based on a review of logs, to the best of our knowledge, was not abused by anyone. Other services/tools using VcsRepository/VcsDriver or derivatives may also be vulnerable and should upgrade their composer/composer dependency immediately. Versions 1.10.22 and 2.0.13 include patches for this issue.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://getcomposer.org/
• https://github.com/composer/composer/security/advisories/GHSA-h5h8-pc6h-jvvx
• DSA-4907-Third Party Advisory
• [debian-lts-announce] 20210511 [SECURITY] [DLA 2654-1] composer security update-Mailing List, Third Party Advisory
• FEDORA-2021-ab7d0d3486-Mailing List, Third Party Advisory
• FEDORA-2021-8a098ecbcf-Mailing List, Third Party Advisory
• https://blog.sonarsource.com/php-supply-chain-attack-on-composer/

 

Keywords

NVD

 

CVE-2021-29472

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures