Insecure Permissions Vulnerability in Phusion Passenger 5.3.x: Information Disclosure via Unix Domain Socket

CVE-2018-12027 · MEDIUM Severity

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

An Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 causes information disclosure in the following situation: given a Passenger-spawned application process that reports that it listens on a certain Unix domain socket, if any of the parent directories of said socket are writable by a normal user that is not the application's user, then that non-application user can swap that directory with something else, resulting in traffic being redirected to a non-application user's process through an alternative Unix domain socket.

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