Incorrect permission assignment for critical resource in Debian Linux - CVE-2017-9780

Vulnerability details

The vulnerability allows a local authenticated user to execute arbitrary code.

In Flatpak before 0.8.7, a third-party app repository could include malicious apps that contain files with inappropriate permissions, for example setuid or world-writable. The files are deployed with those permissions, which would let a local attacker run the setuid executable or write to the world-writable location. In the case of the "system helper" component, files deployed as part of the app are owned by root, so in the worst case they could be setuid root.

Affected software

How to mitigate CVE-2017-9780

External References

• http://www.debian.org/security/2017/dsa-3895
• http://www.securityfocus.com/bid/99346
• https://bugs.debian.org/865413
• https://github.com/flatpak/flatpak/issues/845

Related Security Bulletins

• Incorrect permission assignment for critical resource in Debian Linux
• Fedora 24 update for flatpak