Vulnerability in Phusion Passenger
CVE-2018-12026
During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows such applications to replace key files or directories in the spawning communication directory with symlinks. This then could result in arbitrary reads and writes, which in turn can result in information disclosure and privilege escalation.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.019 (79.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
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-2018-12026?
- CVE-2018-12026 is a critical-severity vulnerability in Phusion Passenger, classified under Improper Link Resolution Before File Access. CVSS score: 9.8/10. Published 2018-06-17.
- How severe is CVE-2018-12026?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-12026 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.