PT-2020-19994 · Ruby · Actionpack Page-Caching

Ooooooo_Q · Published 2020-05-12 · Updated 2022-04-05 · CVE-2020-8159

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions actionpack page-caching gem versions prior to 1.2.1

Description The issue 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.

Recommendations For actionpack page-caching gem versions prior to 1.2.1, update to version 1.2.1 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive areas of the web server to minimize the risk of exploitation.

Exploit

Fix

RCE

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2020-8159

DLA-2719-1

GHSA-MG5P-95M9-RMFP

Affected Products

Actionpack Page-Caching

References · 13

• 🔥 https://groups.google.com/forum/#!topic/rubyonrails-security/CFRVkEytdP8 · Exploit
• https://osv.dev/vulnerability/DLA-2719-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-8159 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-8159 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-8159 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8159 · Security Note
• https://osv.dev/vulnerability/GHSA-mg5p-95m9-rmfp · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-8159 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-8159 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-8159 · Vendor Advisory
• https://github.com/rails/actionpack-page_caching/commit/127da70a559bed4fc573fdb4a6d498a7d5815ce2 · Note
• https://lists.debian.org/debian-lts-announce/2021/07/msg00019.html · Note
• https://groups.google.com/forum/#%21topic/rubyonrails-security/CFRVkEytdP8 · Note