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RDoc RCE vulnerability with .rdoc_options

Moderate severity GitHub Reviewed Published Mar 25, 2024 to the GitHub Advisory Database • Updated Aug 21, 2024

Package

bundler rdoc (RubyGems)

Affected versions

>= 6.4.0, < 6.4.1.1
>= 6.5.0, < 6.5.1.1
>= 6.6.0, < 6.6.3.1
>= 6.3.3, < 6.3.4.1

Patched versions

6.4.1.1
6.5.1.1
6.6.3.1
6.3.4.1

Description

An issue was discovered in RDoc 6.3.3 through 6.6.2, as distributed in Ruby 3.x through 3.3.0.

When parsing .rdoc_options (used for configuration in RDoc) as a YAML file, object injection and resultant remote code execution are possible because there are no restrictions on the classes that can be restored.

When loading the documentation cache, object injection and resultant remote code execution are also possible if there were a crafted cache.

We recommend to update the RDoc gem to version 6.6.3.1 or later. In order to ensure compatibility with bundled version in older Ruby series, you may update as follows instead:

  • For Ruby 3.0 users: Update to rdoc 6.3.4.1
  • For Ruby 3.1 users: Update to rdoc 6.4.1.1
  • For Ruby 3.2 users: Update to rdoc 6.5.1.1

You can use gem update rdoc to update it. If you are using bundler, please add gem "rdoc", ">= 6.6.3.1" to your Gemfile.

Note: 6.3.4, 6.4.1, 6.5.1 and 6.6.3 have a incorrect fix. We recommend to upgrade 6.3.4.1, 6.4.1.1, 6.5.1.1 and 6.6.3.1 instead of them.

References

Published to the GitHub Advisory Database Mar 25, 2024
Reviewed Mar 25, 2024
Published by the National Vulnerability Database May 14, 2024
Last updated Aug 21, 2024

Severity

Moderate

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
Local
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

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

Weaknesses

CVE ID

CVE-2024-27281

GHSA ID

GHSA-592j-995h-p23j

Source code

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