========================================================================== Ubuntu Security Notice USN-4721-1 February 04, 2021
flatpak vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Flatpak could be made to crash or run programs if it received specially crafted input. Software Description: - flatpak: Application deployment framework for desktop apps Details: Simon McVittieg discovered that flatpak-portal service allowed sandboxed applications to execute arbitrary code on the host system (a sandbox escape). A malicious user could create a Flatpak application that set environment variables, trusted by the Flatpak "run" command, and use it to execute arbitrary code outside the sandbox. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: flatpak 1.8.2-1ubuntu0.1 libflatpak0 1.8.2-1ubuntu0.1 Ubuntu 20.04 LTS: flatpak 1.6.5-0ubuntu0.2 libflatpak0 1.6.5-0ubuntu0.2 Ubuntu 18.04 LTS: flatpak 1.0.9-0ubuntu0.2 libflatpak0 1.0.9-0ubuntu0.2 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/4721-1 CVE-2021-21261 Package Information: https://launchpad.net/ubuntu/+source/flatpak/1.8.2-1ubuntu0.1 https://launchpad.net/ubuntu/+source/flatpak/1.6.5-0ubuntu0.2 https://launchpad.net/ubuntu/+source/flatpak/1.0.9-0ubuntu0.2
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