Debian 安全报告

DSA-4830-1 flatpak -- 安全更新

在 Mitre's CVE 的目录中: CVE-2021-21261.

Simon McVittie 在flatpak门户服务中发现了一个bug,它允许沙盒应用程序在主机系统上执行任意代码(沙盒逃脱)。

The Flatpak portal D-Bus service (flatpak-portal, also known by its D-Bus service name org.freedesktop.portal.Flatpak) allows apps in a Flatpak sandbox to launch their own subprocesses in a new sandbox instance, either with the same security settings as the caller or with more restrictive security settings. For example, this is used in Flatpak-packaged web browsers such as Chromium to launch subprocesses that will process untrusted web content, and give those subprocesses a more restrictive sandbox than the browser itself。

In vulnerable versions, the Flatpak portal service passes caller-specified environment variables to non-sandboxed processes on the host system, and in particular to the flatpak run command that is used to launch the new sandbox instance. A malicious or compromised Flatpak app could set environment variables that are trusted by the flatpak run command, and use them to execute arbitrary code that is not in a sandbox。

在稳定版(buster)中,此问题已被修复于版本 1.2.5-0+deb10u2。

我们建议您升级您的 flatpak 软件包。

查看关于 flatpak 的详细信息,请访问其安全追踪页面