Incomplete Fix for Symlink-based Sandbox Escape in Firejail

CVE-2017-5940 · MEDIUM Severity

AV:L/AC:L/AU:N/C:P/I:P/A:P

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.

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