High severity8.8NVD Advisory· Published Jun 17, 2018· Updated Jun 17, 2026
CVE-2018-12027
CVE-2018-12027
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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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
passengerRubyGems | >= 5.3.0, < 5.3.2 | 5.3.2 |
Affected products
1Patches
Vulnerability mechanics
References
5- blog.phusion.nl/passenger-5-3-2nvdMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-whfx-877c-5p28ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2018-12027ghsaADVISORY
- security.gentoo.org/glsa/201807-02nvdThird Party AdvisoryWEB
- github.com/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2018-12027.ymlghsaWEB
News mentions
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