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 and Private Packagist. This allowed users to trigger remote code execution. The vulnerability has been patched on 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.

CWE: CWE-94 CWE-88

CVSS 2: MEDIUM – 6.5 (Version: 2.0)
CVSS 3: HIGH – 8.8 (Version: 3.1)


NVD – CVE-2021-29472
CVE – CVE-2021-29472

Link (max. 20) Quelle Tags MISC Vendor Advisory Press/Media Coverage Third Party Advisory CONFIRM Third Party Advisory Third Party Advisory
DSA-4907 DEBIAN Third Party Advisory Third Party Advisory
[debian-lts-announce] 20210511 [SECURITY] [DLA 2654-1] composer security update MLIST Third Party Advisory

Quelle: NVD – CVE-2021-29472
Datum Veröffentlichung: 2021-04-27T21:15Z, Datum letzte Änderung: 2021-05-12T00:15Z