#VU89167 Inconsistent interpretation of HTTP requests in Gunicorn - CVE-2024-1135

Vulnerability identifier: #VU89167

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-1135

CWE-ID: CWE-444

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gunicorn
Server applications / File servers (FTP/HTTP)

Vendor: Gunicorn

Description

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

The vulnerability exists due to improper validation of HTTP requests when handling Transfer-Encoding headers. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gunicorn: 0.2 - 21.2.0

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External links
https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1
https://github.com/benoitc/gunicorn/releases/tag/22.0.0

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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.