Flatpak Sandbox Bypass Vulnerability (CVE-2021-41133)
Summary
ALEA-2021:4539: flatpak bug fix and enhancement update. Affects flatpak versions < 1.8.5-5.el8_5. Fixed in 1.8.5-5.el8_5. How to fix ↓
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Background
Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. It provides a secure environment for running applications by isolating them from the host system. However, a vulnerability has been discovered in Flatpak that allows an attacker to bypass the sandbox and execute arbitrary code on the host system.
Vulnerability Detail
The vulnerability (CVE-2021-41133) in Flatpak is due to a sandbox bypass that can be achieved through recent VFS-manipulating syscalls. By exploiting this vulnerability, an attacker can escape the application's sandbox and gain unauthorized access to the host system. This can lead to various security risks, including the execution of malicious code, unauthorized data access, and privilege escalation.
How To Fix
Minimum fixed version
1.8.5-5.el8_5
This is the first release that contains the fix.
sudo dnf update flatpakTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the security update as soon as possible to mitigate the risk of exploitation.
Conclusion
The Flatpak sandbox bypass vulnerability (CVE-2021-41133) poses a significant risk to the security of Linux systems running Flatpak. It is crucial to update Flatpak to the latest version to mitigate the risk of exploitation. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
See every vulnerability recorded for flatpak →
FAQ
Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. It provides a secure environment for running applications by isolating them from the host system.
The vulnerability allows an attacker to bypass the Flatpak sandbox and execute arbitrary code on the host system. This can lead to various security risks, including the execution of malicious code, unauthorized data access, and privilege escalation.
To fix this vulnerability, update Flatpak to version 1.8.5-5.el8_5 or later. This update includes a patch that addresses the sandbox bypass issue.
There is no known workaround for this vulnerability. It is essential to apply the security update as soon as possible to mitigate the risk of exploitation.
You can find more information about this vulnerability in the official advisory provided by AlmaLinux: https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALEA-2021:4539.json
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