CVE-2021-21305 Information

Description

CarrierWave is an open-source RubyGem which provides a simple and flexible way to upload files from Ruby applications. In CarrierWave before versions 1.3.2 and 2.1.1 there is a code injection vulnerability. The \manipulate!\ method inappropriately evals the content of mutation option(:read/:write) allowing attackers to craft a string that can be executed as a Ruby code. If an application developer supplies untrusted inputs to the option it will lead to remote code execution(RCE). This is fixed in versions 1.3.2 and 2.1.1.

CVSS Vector

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

Reference

https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#211—2021-02-08 https://github.com/carrierwaveuploader/carrierwave/commit/387116f5c72efa42bc3938d946b4c8d2f22181b7 https://github.com/carrierwaveuploader/carrierwave/security/advisories/GHSA-cf3w-g86h-35x4 https://rubygems.org/gems/carrierwave https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#132—2021-02-08

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8