Insufficient Mount Target Path Check in Cantata-Mounter D-Bus Service

CVE-2018-12559 · MEDIUM Severity

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

An issue was discovered in the cantata-mounter D-Bus service in Cantata through 2.3.1. The mount target path check in mounter.cpp `mpOk()` is insufficient. A regular user can consequently mount a CIFS filesystem anywhere (e.g., outside of the /home directory tree) by passing directory traversal sequences such as a home/../usr substring.

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