Firejail allows --chroot when seccomp is not supported, which might allow local users to gain privileges.

Description

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

References

• [oss-security] 20170105 Re: Firejail local root exploit mailing-list
• [oss-security] 20170106 Re: Firejail local root exploit mailing-list