Information disclosure in Phusion Passenger
CVE-2017-16355
In agent/Core/SpawningKit/Spawner.h in Phusion Passenger 5.1.10 (fixed in Passenger Open Source 5.1.11 and Passenger Enterprise 5.1.10), if Passenger is running as root, it is possible to list the contents of arbitrary files on a system by symlinking a file named REVISION from the application root folder to a file of choice and querying passenger-status --show=xml.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Phusion Passenger
- Debian Linux — versions 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.phusion.nl/2017/10/13/passenger-security-advisory-5-1-11/ (Third Party Advisory)
- github.com/phusion/passenger/commit/4043718264095cde6623c2cbe8c644541036d7bf (Patch, Third Party Advisory)
- www.debian.org/security/2019/dsa-4415 (vendor-advisory, Third Party Advisory)
- seclists.org/bugtraq/2019/Mar/34 (mailing-list, Mailing List, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2017-16355?
- CVE-2017-16355 is a medium-severity vulnerability in Phusion Passenger, classified under Information Disclosure. CVSS score: 4.7/10. Published 2017-12-14.
- How severe is CVE-2017-16355?
- Medium severity. CVSS v3 base score is 4.7 out of 10.
- Is CVE-2017-16355 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.