CVE-2018-12029
Phusion Passenger Race Condition Allows Privilege Escalation
7.0
HIGH
CVSS 3.1
EPSS 0.10%
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.
How to fix CVE-2018-12029
To remediate CVE-2018-12029, upgrade the affected package to a fixed version below.
- —upgrade to 5.0.30-1.1 or later
- —upgrade to 5.3.2 or later
Is CVE-2018-12029 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 5.0.30-1.1
- >= 3.0.0, < 5.3.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.0 | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |