Denial of service in Rack

1) Input validation error

EUVDB-ID: #VU87008

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-26146

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

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 - 3.0.9

External links

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

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.