#VU97643 Inconsistent interpretation of HTTP requests in Puma - CVE-2024-45614

Vulnerability identifier: #VU97643

Vulnerability risk: Medium

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

CVE-ID: CVE-2024-45614

CWE-ID: CWE-444

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Puma
Server applications / Web servers

Vendor: Evan Phoenix

Description

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to the header normalization allows for client to clobber proxy set headers. A remote attacker can send a specially crafted HTTP request to the server and gain access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Puma: 5.0.0 - 5.0.4, 5.1.0 - 5.1.1, 5.2.0 - 5.2.2, 5.3.0 - 5.3.2, 5.4.0, 5.5.0 - 5.5.2, 5.6.0 - 5.6.8, 6.0.0 - 6.0.2, 6.1.0 - 6.1.1, 6.2.0 - 6.2.2, 6.3.0 - 6.3.1, 6.4.0 - 6.4.2

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External links
https://github.com/puma/puma/security/advisories/GHSA-9hf4-67fc-4vf4
https://nginx.org/en/docs/http/ngx_http_core_module.html#underscores_in_headers

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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.