Information disclosure in Phusion Passenger
CVE-2018-12027
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (64.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
Weakness classification (CWE)
References
- blog.phusion.nl/passenger-5-3-2 (Mitigation, Vendor Advisory)
- security.gentoo.org/glsa/201807-02 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-12027?
- CVE-2018-12027 is a high-severity vulnerability in Phusion Passenger, classified under Information Disclosure. CVSS score: 8.8/10. Published 2018-06-17.
- How severe is CVE-2018-12027?
- High severity. CVSS v3 base score is 8.8 out of 10.