CVE-2018-12029
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 5.0.30-1.1 |
| sid | Fixed | 5.0.30-1.1 |
| forky | Fixed | 5.0.30-1.1 |
| bullseye | Fixed | 5.0.30-1.1 |
| bookworm | Fixed | 5.0.30-1.1 |
References
- https://blog.phusion.nl/2018/06/12/passenger-5-3-2-various-security-fixes/
- https://www.suse.com/security/cve/CVE-2018-12029.html
- https://nvd.nist.gov/vuln/detail/CVE-2018-12029
- https://blog.phusion.nl/2018/06/12/passenger-5-3-2-various-security-fixes
- https://blog.phusion.nl/passenger-5-3-2
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2018-12029.yml
- https://lists.debian.org/debian-lts-announce/2018/06/msg00007.html
- https://pulsesecurity.co.nz/advisories/phusion-passenger-priv-esc
- https://security.gentoo.org/glsa/201807-02
- https://security-tracker.debian.org/tracker/CVE-2018-12029
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.