Debian Security Advisory

DSA-4742-1 firejail -- security update

Date Reported:
06 Aug 2020
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-17367, CVE-2020-17368.
More information:

Tim Starling discovered two vulnerabilities in firejail, a sandbox program to restrict the running environment of untrusted applications.

  • CVE-2020-17367

    It was reported that firejail does not respect the end-of-options separator ("--"), allowing an attacker with control over the command line options of the sandboxed application, to write data to a specified file.

  • CVE-2020-17368

    It was reported that firejail when redirecting output via --output or --output-stderr, concatenates all command line arguments into a single string that is passed to a shell. An attacker who has control over the command line arguments of the sandboxed application could take advantage of this flaw to run arbitrary commands.

For the stable distribution (buster), these problems have been fixed in version

We recommend that you upgrade your firejail packages.

For the detailed security status of firejail please refer to its security tracker page at: