CVE-2018-12029 - CVE House
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Status published High CVE-2018-12029

A race condition in the nginx module in Phusion Passenger...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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CVE-2018-12028
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CVE-2018-12027
An Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x...
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CVE-2018-12026
During the spawning of a malicious Passenger-managed application, SpawningKit in...
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CVE-2017-16355
In agent/Core/SpawningKit/Spawner.h in Phusion Passenger 5.1.10 (fixed in Passenger Open...
Medium 4.7

Affected Vendor

Affected Software

passenger, debian linux
Vulnerable Versions:
3.0.0, 8.0

Timeline

Official Publish: June 17th, 2018
Last Modified: August 5th, 2024
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.