Vulnerability identifier: #VU53004

Vulnerability risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-22904

CWE-ID:

Exploitation vector: Network

Exploit availability:

Vulnerable software:
Ruby on Rails
Universal components / Libraries / Scripting languages

Vendor: Rails

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error in the Token Authentication logic in Action Controller. A remote attacker can send a specially crafted request and cause a denial of service condition on the target system. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Ruby on Rails: 4.0.0 - 6.1.3.1

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Fixed software versions

CPE

• cpe:2.3:a:rails:ruby_on_rails:4.2.11.3:*:*:*:*:*:*:*

External links
http://seclists.org/oss-sec/2021/q2/102

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?