An update for flatpak is now available for openEuler-20.03-LTS and openEuler-20.03-LTS-SP1 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2021-1043 Final 1.0 1.0 2021-03-05 Initial 2021-03-05 2021-03-05 openEuler SA Tool V1.0 2021-03-05 flatpak security update An update for flatpak is now available for openEuler-20.03-LTS and openEuler-20.03-LTS-SP1. flatpak is a system for building, distributing and running sandboxed desktop applications on Linux. See https://wiki.gnome.org/Projects/SandboxedApps for more information. Security Fix(es): Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. A bug was discovered in the `flatpak-portal` service that can allow sandboxed applications to execute arbitrary code on the host system (a sandbox escape). This sandbox-escape bug is present in versions from 0.11.4 and before fixed versions 1.8.5 and 1.9.4. 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. As a workaround, this vulnerability can be mitigated by preventing the `flatpak-portal` service from starting, but that mitigation will prevent many Flatpak apps from working correctly. This is fixed in versions 1.8.5 and 1.9.4.(CVE-2021-21261) An update for flatpak is now available for openEuler-20.03-LTS and openEuler-20.03-LTS-SP1. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High flatpak https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1043 https://openeuler.org/en/security/cve/detail.html?id=CVE-2021-21261 https://nvd.nist.gov/vuln/detail/CVE-2021-21261 openEuler-20.03-LTS openEuler-20.03-LTS-SP1 flatpak-debugsource-1.0.3-3.oe1.aarch64.rpm flatpak-debuginfo-1.0.3-3.oe1.aarch64.rpm flatpak-devel-1.0.3-3.oe1.aarch64.rpm flatpak-1.0.3-3.oe1.aarch64.rpm flatpak-debugsource-1.0.3-3.oe1.aarch64.rpm flatpak-debuginfo-1.0.3-3.oe1.aarch64.rpm flatpak-devel-1.0.3-3.oe1.aarch64.rpm flatpak-1.0.3-3.oe1.aarch64.rpm flatpak-help-1.0.3-3.oe1.noarch.rpm flatpak-help-1.0.3-3.oe1.noarch.rpm flatpak-1.0.3-3.oe1.src.rpm flatpak-1.0.3-3.oe1.src.rpm flatpak-devel-1.0.3-3.oe1.x86_64.rpm flatpak-debugsource-1.0.3-3.oe1.x86_64.rpm flatpak-debuginfo-1.0.3-3.oe1.x86_64.rpm flatpak-1.0.3-3.oe1.x86_64.rpm flatpak-devel-1.0.3-3.oe1.x86_64.rpm flatpak-debugsource-1.0.3-3.oe1.x86_64.rpm flatpak-debuginfo-1.0.3-3.oe1.x86_64.rpm flatpak-1.0.3-3.oe1.x86_64.rpm Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. A bug was discovered in the `flatpak-portal` service that can allow sandboxed applications to execute arbitrary code on the host system (a sandbox escape). This sandbox-escape bug is present in versions from 0.11.4 and before fixed versions 1.8.5 and 1.9.4. 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. As a workaround, this vulnerability can be mitigated by preventing the `flatpak-portal` service from starting, but that mitigation will prevent many Flatpak apps from working correctly. This is fixed in versions 1.8.5 and 1.9.4. 2021-03-05 CVE-2021-21261 openEuler-20.03-LTS openEuler-20.03-LTS-SP1 High 8.8 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H flatpak security update 2021-03-05 https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1043