Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
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.
AnalysisAI
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.
Technical ContextAI
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. Affected products include: Firejail Project Firejail. Version information: before 0.9.60.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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
In Firejail before 0.9.60, seccomp filters are writable inside the jail, leading to a lack of intended seccomp restricti
Firejail before 0.9.64.4 allows attackers to bypass intended access restrictions because there is a TOCTOU race conditio
Firejail through 0.9.62 mishandles shell metacharacters during use of the --output or --output-stderr option, which may
Firejail before 0.9.44.4, when running on a Linux kernel before 4.8, allows context-dependent attackers to bypass a secc
Firejail 0.9.38.4 allows local users to execute arbitrary commands outside of the sandbox via a crafted TIOCSTI ioctl ca
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
Firejail allows --chroot when seccomp is not supported, which might allow local users to gain privileges. Rated high sev
Firejail does not properly clean environment variables, which allows local users to gain privileges. Rated high severity
Firejail does not restrict access to --tmpfs, which allows local users to gain privileges, as demonstrated by mounting o
Firejail before 0.9.44.4, when running a bandwidth command, allows local users to gain root privileges via the --shell a
Firejail uses weak permissions for /dev/shm/firejail and possibly other files, which allows local users to gain privileg
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External POC / Exploit Code
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