CVEvulnerability
CVE-2018-12029
7.0 HIGH
Official page ↗
- Status
- Modified
- Published
- 2018-06-17
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 7.0 HIGH — CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.4 MEDIUM — AV:L/AC:M/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-362
Description
A race condition in the nginx module in Phusion Passenger 3.x through 5.x before 5.3.2 allows local escalation of privileges when a non-standard passenger_instance_registry_dir with insufficiently strict permissions is configured. Replacing a file with a symlink after the file was created, but before it was chowned, leads to the target of the link being chowned via the path. Targeting sensitive files such as root's crontab file allows privilege escalation.
Affected configurations
• phusion passenger (>= 3.0.0 < 5.3.2)
• debian debian linux 8.0
Related
Weakness · CWE (1)
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness
References
- https://blog.phusion.nl/passenger-5-3-2 Mitigation, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/06/msg00007.html Mailing List, Third Party Advisory
- https://pulsesecurity.co.nz/advisories/phusion-passenger-priv-esc Third Party Advisory
- https://security.gentoo.org/glsa/201807-02 Third Party Advisory
- https://blog.phusion.nl/passenger-5-3-2 Mitigation, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/06/msg00007.html Mailing List, Third Party Advisory
- https://pulsesecurity.co.nz/advisories/phusion-passenger-priv-esc Third Party Advisory
- https://security.gentoo.org/glsa/201807-02 Third Party Advisory