Code Injection in CarrierWave - CVE-2021-21305
Published: February 15, 2021
Vulnerability identifier: #VU50707
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-21305
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to the #manipulate! method inappropriately evals the content of mutation option (:read/ :write). A remote authenticated attacker can send a specially crafted request and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
CarrierWave
Ubuntu
ruby-carrierwave (Ubuntu package)
Ubuntu
ruby-carrierwave (Ubuntu package)
How to mitigate CVE-2021-21305
Install updates from vendor's website.
CarrierWave - addressed in versions 1.3.2, 2.1.1
ruby-carrierwave (Ubuntu package) - update to Ubuntu Pro
ruby-carrierwave (Ubuntu package) - update to Ubuntu Pro
External References
- https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#132---2021-02-08
- 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