Test ID:	1.3.6.1.4.1.25623.1.1.2.2021.2799
Category:	Huawei EulerOS Local Security Checks
Title:	Huawei EulerOS: Security Advisory for flatpak (EulerOS-SA-2021-2799)
Summary:	The remote host is missing an update for the Huawei EulerOS 'flatpak' package(s) announced via the EulerOS-SA-2021-2799 advisory.
Description:	Summary: The remote host is missing an update for the Huawei EulerOS 'flatpak' package(s) announced via the EulerOS-SA-2021-2799 advisory. Vulnerability Insight: Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. In versions prior to 1.10.4 and 1.12.0, Flatpak apps with direct access to AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can trick portals and other host-OS services into treating the Flatpak app as though it was an ordinary, non-sandboxed host-OS process. They can do this by manipulating the VFS using recent mount-related syscalls that are not blocked by Flatpak's denylist seccomp filter, in order to substitute a crafted `/.flatpak-info` or make that file disappear entirely. Flatpak apps that act as clients for AF_UNIX sockets such as those used by Wayland, Pipewire or pipewire-pulse can escalate the privileges that the corresponding services will believe the Flatpak app has. Note that protocols that operate entirely over the D-Bus session bus (user bus), system bus or accessibility bus are not affected by this. This is due to the use of a proxy process `xdg-dbus-proxy`, whose VFS cannot be manipulated by the Flatpak app, when interacting with these buses. Patches exist for versions 1.10.4 and 1.12.0, and as of time of publication, a patch for version 1.8.2 is being planned. There are no workarounds aside from upgrading to a patched version.(CVE-2021-41133) Affected Software/OS: 'flatpak' package(s) on Huawei EulerOS V2.0SP8. Solution: Please install the updated package(s). CVSS Score: 4.6 CVSS Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-41133 https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q Debian Security Information: DSA-4984 (Google Search) https://www.debian.org/security/2021/dsa-4984 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R5656ONDP2MGKIJMKEC7N2NXCV27WGTC/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T5DKCYRC6MFSTFCUP4DELCOUUP3SFEFX/ https://security.gentoo.org/glsa/202312-12 https://github.com/flatpak/flatpak/commit/1330662f33a55e88bfe18e76de28b7922d91a999 https://github.com/flatpak/flatpak/commit/26b12484eb8a6219b9e7aa287b298a894b2f34ca https://github.com/flatpak/flatpak/commit/462fca2c666e0cd2b60d6d2593a7216a83047aaf https://github.com/flatpak/flatpak/commit/4c34815784e9ffda5733225c7d95824f96375e36 https://github.com/flatpak/flatpak/commit/89ae9fe74c6d445bb1b3a40e568d77cf5de47e48 https://github.com/flatpak/flatpak/commit/9766ee05b1425db397d2cf23afd24c7f6146a69f https://github.com/flatpak/flatpak/commit/a10f52a7565c549612c92b8e736a6698a53db330 https://github.com/flatpak/flatpak/commit/e26ac7586c392b5eb35ff4609fe232c52523b2cf http://www.openwall.com/lists/oss-security/2021/10/26/9
Copyright	Copyright (C) 2021 Greenbone AG

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