DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
passenger (PTS)bullseye5.0.30-1.2+deb11u1fixed
sid, trixie6.0.20+ds-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
passengersource(unstable)(not affected)
ruby-passengersource(unstable)(not affected)


- passenger <not-affected> (Introduced in 5.3.0 with major refactoring of SpawningKit)
- ruby-passenger <not-affected> (Introduced in 5.3.0 with major refactoring of SpawningKit)

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