#VU87008 Input validation error in Rack - CVE-2024-26146

Vulnerability identifier: #VU87008

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-26146

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 in the header parsing. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Rack: 2.0 - 2.0.9.3, 2.1.0 - 2.1.4.3, 2.2.0 - 2.2.8, 3.0.0 - 3.0.9

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External links
https://github.com/rack/rack/security/advisories/GHSA-54rr-7fvw-6x8f
https://github.com/rack/rack/commit/30b8e39a578b25d4bdcc082c1c52c6f164b59716
https://github.com/rack/rack/commit/6c5d90bdcec0949f7ba06db62fb740dab394b582
https://github.com/rack/rack/commit/a227cd793778c7c3a827d32808058571569cda6f
https://github.com/rack/rack/commit/e4c117749ba24a66f8ec5a08eddf68deeb425ccd
https://discuss.rubyonrails.org/t/possible-denial-of-service-vulnerability-in-rack-header-parsing/84942
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-26146.yml

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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.