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CVE-2018-12026 — Vulnerability in passenger — CVE Details

CRITICAL

Phusion Passenger SpawningKit Contains Arbitrary Read/Write Vulnerability

Published May 14, 2022Updated February 20, 2024Source: osv

Summary

During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows such applications to replace key files or directories in the spawning communication directory with symlinks. This then could result in arbitrary reads and writes, which in turn can result in information disclosure and privilege escalation.

Advisory Timeline

  • First published May 14, 2022 (1612 days ago).
  • Last revised February 20, 2024 — 647 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.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

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

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

References

Frequently Asked Questions

What is CVE-2018-12026?
Phusion Passenger SpawningKit Contains Arbitrary Read/Write Vulnerability This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2018-12026?
CVE-2018-12026 affects passenger. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-12026 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-7cv3-gvmc-8mq5

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