Inconsistent interpretation of HTTP requests in Puma

1) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU97643

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 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

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 - 6.4.2

CPE2.3

• cpe:2.3:a:puma:puma:5.0.0:*:*:*:*:rubygems:*:*
• cpe:2.3:a:puma:puma:5.0.1:*:*:*:*:rubygems:*:*
• cpe:2.3:a:puma:puma:5.0.2:*:*:*:*:rubygems:*:*
• cpe:2.3:a:puma:puma:5.0.3:*:*:*:*:rubygems:*:*
• cpe:2.3:a:puma:puma:5.0.4:*:*:*:*:rubygems:*:*
• cpe:2.3:a:puma:puma:5.1.0:*:*:*:*:rubygems:*:*
• cpe:2.3:a:puma:puma:5.1.1:*:*:*:*:rubygems:*:*
• cpe:2.3:a:puma:puma:5.2.0:*:*:*:*:rubygems:*:*
• cpe:2.3:a:puma:puma:5.2.1:*:*:*:*:rubygems:*:*
• cpe:2.3:a:puma:puma:5.2.2:*:*:*:*:rubygems:*:*

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.