Firejail

A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Improper Privilege Management vulnerability could allow attackers to escalate privileges to gain unauthorized elevated access.

Firejail before 0.9.64.4 allows attackers to bypass intended access restrictions because there is a TOCTOU race condition between a stat operation and an OverlayFS mount operation. Rated high severity (CVSS 7.0). Public exploit code available.

Firejail through 0.9.62 mishandles shell metacharacters during use of the --output or --output-stderr option, which may lead to command injection. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Firejail through 0.9.62 does not honor the -- end-of-options indicator after the --output option, which may lead to command injection. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

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. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. Public exploit code available.

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. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required.

Firejail allows --chroot when seccomp is not supported, which might allow local users to gain privileges. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Firejail does not properly clean environment variables, which allows local users to gain privileges. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Firejail uses weak permissions for /dev/shm/firejail and possibly other files, which allows local users to gain privileges. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Firejail uses 0777 permissions when mounting (1) /dev, (2) /dev/shm, (3) /var/tmp, or (4) /var/lock, which allows local users to gain privileges. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Firejail uses 0777 permissions when mounting /tmp, which allows local users to gain privileges. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Firejail allows local users to truncate /etc/resolv.conf via a chroot command to /. Rated low severity (CVSS 3.3), this vulnerability is low attack complexity. No vendor patch available.

Firejail does not restrict access to --tmpfs, which allows local users to gain privileges, as demonstrated by mounting over /etc. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Firejail before 0.9.44.4, when running a bandwidth command, allows local users to gain root privileges via the --shell argument. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Improper Privilege Management vulnerability could allow attackers to escalate privileges to gain unauthorized elevated access.

Firejail before 0.9.44.4, when running on a Linux kernel before 4.8, allows context-dependent attackers to bypass a seccomp-based sandbox protection mechanism via the --allow-debuggers argument. Rated critical severity (CVSS 9.0), this vulnerability is remotely exploitable, no authentication required.

Firejail before 0.9.44.6 and 0.9.38.x LTS before 0.9.38.10 LTS does not comprehensively address dotfile cases during its attempt to prevent accessing user files with an euid of zero, which allows. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. This Improper Privilege Management vulnerability could allow attackers to escalate privileges to gain unauthorized elevated access.

Firejail before 0.9.44.4 and 0.9.38.x LTS before 0.9.38.8 LTS does not consider the .Xauthority case during its attempt to prevent accessing user files with an euid of zero, which allows local users. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

Firejail 0.9.38.4 allows local users to execute arbitrary commands outside of the sandbox via a crafted TIOCSTI ioctl call. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity.