Test ID:	1.3.6.1.4.1.25623.1.0.704830
Category:	Debian Local Security Checks
Title:	Debian: Security Advisory (DSA-4830-1)
Summary:	The remote host is missing an update for the Debian 'flatpak' package(s) announced via the DSA-4830-1 advisory.
Description:	Summary: The remote host is missing an update for the Debian 'flatpak' package(s) announced via the DSA-4830-1 advisory. Vulnerability Insight: Simon McVittie discovered a bug in the flatpak-portal service that can allow sandboxed applications to execute arbitrary code on the host system (a sandbox escape). 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. For the stable distribution (buster), this problem has been fixed in version 1.2.5-0+deb10u2. We recommend that you upgrade your flatpak packages. For the detailed security status of flatpak please refer to its security tracker page at: [link moved to references] Affected Software/OS: 'flatpak' package(s) on Debian 10. Solution: Please install the updated package(s). CVSS Score: 7.2 CVSS Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-21261 https://github.com/flatpak/flatpak/security/advisories/GHSA-4ppf-fxf6-vxg2 Debian Security Information: DSA-4830 (Google Search) https://www.debian.org/security/2021/dsa-4830 https://security.gentoo.org/glsa/202101-21 https://github.com/flatpak/flatpak/commit/6d1773d2a54dde9b099043f07a2094a4f1c2f486 https://github.com/flatpak/flatpak/commit/6e5ae7a109cdfa9735ea7ccbd8cb79f9e8d3ae8b https://github.com/flatpak/flatpak/commit/aeb6a7ab0abaac4a8f4ad98b3df476d9de6b8bd4 https://github.com/flatpak/flatpak/commit/cc1401043c075268ecc652eac557ef8076b5eaba https://github.com/flatpak/flatpak/releases/tag/1.8.5
Copyright	Copyright (C) 2021 Greenbone AG

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