#VU64862 Input validation error in Rack - CVE-2022-30122

Vulnerability identifier: #VU64862

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-30122

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rack
Web applications / Modules and components for CMS

Vendor: Rack

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when parsing multipart POST requests. A remote attacker can send specially crafted multipart POST requests to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Rack: 1.2 - 1.2.8, 1.3 - 1.3.10, 1.4 - 1.4.7, 1.5 - 1.5.5, 1.6 - 1.6.13, 2.0 - 2.0.9, 2.1.0 - 2.1.4, 2.2.0 - 2.2.3

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External links
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2022-30122.yml
https://github.com/rack/rack/commit/d286516cbd58fbb2ad6944ce9040e9ba96d9371a

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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.