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CVE-2020-8159 — Arbitrary file write in actionpack-page_caching —...

CRITICAL

Arbitrary file write in actionpack-page_caching gem

Published May 13, 2020Updated November 8, 2023Source: osv

Summary

There is a vulnerability in actionpack_page-caching gem < v1.2.1 that allows an attacker to write arbitrary files to a web server, potentially resulting in remote code execution if the attacker can write unescaped ERB to a view.

Advisory Timeline

  • First published May 13, 2020 (2343 days ago).
  • Last revised November 8, 2023 — 1273 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update actionpack-page_caching to 1.2.1 or later
gem install actionpack-page_caching -v 1.2.1

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

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
actionpack-page_caching
rubygems
1.0.0, 1.0.1, 1.0.2, 1.1.0 (+2 more)1.2.1

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

References

Frequently Asked Questions

What is CVE-2020-8159?
Arbitrary file write in actionpack-page_caching gem 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-2020-8159?
CVE-2020-8159 affects actionpack-page_caching. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-8159 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-mg5p-95m9-rmfp

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