Vulnerability · Published Apr 27, 2021 · Assigned by GitHub_M
CVE-2021-29472Missing argument delimiter can lead to code execution via VCS repository URLs or source download URLs on systems with Mercurial in composer
High 8.8
In plain English
A high-severity argument injection in composer from composer. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.8% (higher than 92% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | composer | 2.0.13-r0 | ALPINE-CVE-2021-29472 |
| Alpine:v3.21 | composer | 2.0.13-r0 | ALPINE-CVE-2021-29472 |
| Alpine:v3.22 | composer | 2.0.13-r0 | ALPINE-CVE-2021-29472 |
| Alpine:v3.23 | composer | 2.0.13-r0 | ALPINE-CVE-2021-29472 |
| Alpine:v3.24 | composer | 2.0.13-r0 | ALPINE-CVE-2021-29472 |
| Debian:12 | composer | 2.0.9-2 | DEBIAN-CVE-2021-29472 |
| Debian:13 | composer | 2.0.9-2 | DEBIAN-CVE-2021-29472 |
| Debian:14 | composer | 2.0.9-2 | DEBIAN-CVE-2021-29472 |
| Packagist | composer/composer | 2.0.13 | GHSA-h5h8-pc6h-jvvx |
| Packagist | composer/composer | 1.10.22 | GHSA-h5h8-pc6h-jvvx |
Affected products (as reported)
Weakness: CWE-88, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/composer/composer/security/advisories/GHSA-h5h8-pc6h-jvvx x_refsource_CONFIRM
- https://getcomposer.org/ x_refsource_MISC
- DSA-4907 vendor-advisory, x_refsource_DEBIAN
- [debian-lts-announce] 20210511 [SECURITY] [DLA 2654-1] composer security update mailing-list, x_refsource_MLIST
- FEDORA-2021-8a098ecbcf vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-ab7d0d3486 vendor-advisory, x_refsource_FEDORA
- https://blog.sonarsource.com/php-supply-chain-attack-on-composer/ x_refsource_MISC