Multiple vulnerabilities in CarrierWave

Published: 2021-02-15

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-21288 CVE-2021-21305
CWE-ID	CWE-918 CWE-94
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	CarrierWave Web applications / Modules and components for CMS
Vendor	CarrierWave

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU50706

Risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-21288

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in the download feature. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

CarrierWave: 0.1.0 - 2.1.0

External links

http://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#132---2021-02-08
http://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#211---2021-02-08
http://github.com/carrierwaveuploader/carrierwave/commit/012702eb3ba1663452aa025831caa304d1a665c0
http://github.com/carrierwaveuploader/carrierwave/security/advisories/GHSA-fwcm-636p-68r5
http://rubygems.org/gems/carrierwave/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Code Injection

EUVDB-ID: #VU50707

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-21305

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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.