HTTP request smuggling in PSR-7

1) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU75203

Risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-29197

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 improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request that contains a newline character 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

PSR-7: 1.0.0 - 2.4.4

External links

http://github.com/guzzle/psr7/security/advisories/GHSA-q7rv-6hp3-vh96
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2022-24775
http://github.com/guzzle/psr7/security/advisories/GHSA-wxmh-65f7-jcvw
http://www.rfc-editor.org/rfc/rfc7230#section-3.2.4

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.