CVE-2021-29472— Missing argument delimiter can lead to code execution via VCS repository URLs or source download URLs on systems with Mercurial in composer

Missing argument delimiter can lead to code execution via VCS repository URLs or source download URLs on systems with Mercurial in composer

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.

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

参数注入或修改

composer 参数注入漏洞

composer是 开源的一个应用软件。提供一个声明，管理和安装PHP项目的依赖项。 Composer 存在参数注入漏洞，该漏洞源于composer.json和包源代码下载url没有被正确地清除。

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