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Ubuntu 20.04 LTS USN-5141-1 Critical: Firejail File Overwrite Issue

ubuntu
Calendar Grey November 11, 2021
Dist Ubuntu Esm H88
Ubuntu Security Notification USN-5142-2 pertains to OpenSSL vulnerability, providing patch guidelines and remedial measures.
Firejail could be made to overwrite files as the administrator.

Summary

Firejail could be made to overwrite files as the administrator.

Software Description:

- firejail: Application sandbox

Details:

Roman Fiedler discovered that a race condition existed in Firejail

when using OverlayFS to prevent writes to the underlying file system. A

local attacker could use this to gain administrative privileges. Note:

this update disables support for OverlayFS in Firejail.

Topics%20covered

Topics Covered

security advisory critical file overwrite ubuntu administrative access firejail overlayfs

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
  firejail                        0.9.62-3ubuntu0.1

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5141-1

CVE-2021-26910

Severity
critical
Lowest
Low
Medium
High
Critical

November 11, 2021

Topics%20covered

Topics Covered

security advisory critical file overwrite ubuntu administrative access firejail overlayfs

Package Information

https://launchpad.net/ubuntu/+source/firejail/0.9.62-3ubuntu0.1

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