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CVE-2018-12027 — Insecure Permissions in passenger — CVE Details

HIGH

Insecure Permissions in Phusion Passenger

Published May 13, 2022Updated February 16, 2024Source: osv

Summary

An Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 causes information disclosure in the following situation: given a Passenger-spawned application process that reports that it listens on a certain Unix domain socket, if any of the parent directories of said socket are writable by a normal user that is not the application's user, then that non-application user can swap that directory with something else, resulting in traffic being redirected to a non-application user's process through an alternative Unix domain socket.

Advisory Timeline

  • First published May 13, 2022 (1613 days ago).
  • Last revised February 16, 2024 — 644 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update passenger to 5.3.2 or later
gem install passenger -v 5.3.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
passenger
rubygems
5.3.0, 5.3.15.3.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-200
    Information ExposureMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2018-12027?
Insecure Permissions in Phusion Passenger This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.8/10).
How do I check if my project is affected by CVE-2018-12027?
CVE-2018-12027 affects passenger. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-12027 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.8

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-whfx-877c-5p28

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