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TI-2018-08622 Aliases CVE-2018-12029GHSA-jjcj-fgfm-9g9r

A race condition in the nginx module in Phusion Passenger 3.x through 5.x before 5.3.2…

Priority LOW 31CWE-362Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA, GitHub and Red Hat.

Summary

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.

Why it matters now

EPSS 0.00274 19th percentileScored 2026-11-07
Fix Partial passenger (RubyGems): 5.3.2Red Hat: 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—passenger (RubyGems)3.0.0 to before 5.3.25.3.2Patch availableGHSA-jjcj-fgfm-9g9r
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • passenger (RubyGems) Vendor— Affected 3.0.0 to before 5.3.2 Fixed in 5.3.2 Patch available GHSA-jjcj-fgfm-9g9r

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:phusion:passenger:*:*:*:*:*:*:*:*3.0.0 to before 5.3.2VulnerablePhusion
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
  • cpe:2.3:a:phusion:passenger:*:*:*:*:*:*:*:* Versions 3.0.0 to before 5.3.2 Vulnerable ·Phusion
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian

Remediation

  • Fix · GHSA-jjcj-fgfm-9g9r passenger (RubyGems) Fixed in 5.3.2 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ceph Storage 1.3AffectedNo fix planned: Will not fix
Not affected: 2 products
  • Red Hat Satellite 6
  • Red Hat Update Infrastructure 3 for Cloud Providers

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-12029
  2. 2026-10-03 Alias added: GHSA-jjcj-fgfm-9g9r

References

Advisory 5

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences