Description
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 local users to conduct sandbox-escape attacks via vectors involving a symlink and the --private option. NOTE: this vulnerability exists because of an incomplete fix for CVE-2017-5180.
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firejail | 0.9.44.6-1 | — |
| Debian 13 | firejail | 0.9.44.6-1 | — |
| Debian 12 | firejail | 0.9.44.6-1 | — |
References
- https://github.com/netblue30/firejail/commit/b8a4ff9775318ca5e679183884a6a63f3da8f863
- GLSA-201702-03 vendor-advisory
- https://github.com/netblue30/firejail/commit/38d418505e9ee2d326557e5639e8da49c298858f
- https://firejail.wordpress.com/download-2/release-notes/
- http://www.openwall.com/lists/oss-security/2017/01/31/16
- https://github.com/netblue30/firejail/commit/903fd8a0789ca3cc3c21d84cd0282481515592ef
- 96221 vdb-entry