SB2020021730 - Fedora 31 update for firejail 

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2020021730

SB2020021730 - Fedora 31 update for firejail

Published: February 17, 2020 Updated: April 25, 2025

Security Bulletin ID SB2020021730
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Improper access control (CVE-ID: CVE-2019-12589)

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

In Firejail before 0.9.60, seccomp filters are writable inside the jail, leading to a lack of intended seccomp restrictions for a process that is joined to the jail after a filter has been modified by an attacker.


2) Input validation error (CVE-ID: CVE-2019-12499)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Firejail before 0.9.60 allows truncation (resizing to length 0) of the firejail binary on the host by running exploit code inside a firejail sandbox and having the sandbox terminated. To succeed, certain conditions need to be fulfilled: The jail (with the exploit code inside) needs to be started as root, and it also needs to be terminated as root from the host (either by stopping it ungracefully (e.g., SIGKILL), or by using the --shutdown control command). This is similar to CVE-2019-5736.


Remediation

Install update from vendor's website.

References