RubySec

Providing security resources for the Ruby community

CVE-2018-12027 (passenger): Insecure Permissions in Phusion Passenger

ADVISORIES

GEM

passenger

SEVERITY

CVSS v3.x: 8.8 (High)

CVSS v2.0: 6.5 (Medium)

UNAFFECTED VERSIONS

  • < 5.3.0

PATCHED VERSIONS

  • >= 5.3.2

DESCRIPTION

"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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