CVE-2021-29472 - log back

CVE-2021-29472 edited at 27 Apr 2021 23:00:30
Severity
- Unknown
+ Medium
Remote
- Unknown
+ Remote
Type
- Unknown
+ Arbitrary code execution
Description
+ A security issue was found in Composer before versions 1.10.22 and 2.0.13. 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.
References
+ https://github.com/composer/composer/security/advisories/GHSA-h5h8-pc6h-jvvx
+ https://github.com/composer/composer/commit/083b73515d1d72bc61c6374440b3f8a37531f8cf
+ https://github.com/composer/composer/commit/332c46af8bebdead80a2601350dff7af0ac1f490
Notes
CVE-2021-29472 created at 27 Apr 2021 22:56:17