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Remote code execution via user-provided local names in ActionView

High severity GitHub Reviewed Published Jul 7, 2020 to the GitHub Advisory Database • Updated Jul 5, 2023

Package

bundler actionview (RubyGems)

Affected versions

<= 4.2.11.1

Patched versions

4.2.11.3

Description

The is a code injection vulnerability in versions of Rails prior to 5.0.1 that would allow an attacker who controlled the locals argument of a render call to perform a RCE.

References

Published by the National Vulnerability Database Jul 2, 2020
Reviewed Jul 7, 2020
Published to the GitHub Advisory Database Jul 7, 2020
Last updated Jul 5, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS score

96.502%
(100th percentile)

Weaknesses

CVE ID

CVE-2020-8163

GHSA ID

GHSA-cr3x-7m39-c6jq

Source code

No known source code
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