#VU58370 Inconsistent interpretation of HTTP requests


Published: 2021-11-25

Vulnerability identifier: #VU58370

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41267

CWE-ID: CWE-444

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
http-kernel
Web applications / Modules and components for CMS

Vendor: Symfony

Description

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

The vulnerability exists due to improper validation of HTTP requests. 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

http-kernel: 5.2.0, 5.2.0 BETA1, 5.2.0 BETA2, 5.2.0 BETA3, 5.2.0 RC1, 5.2.0 RC2, 5.2.1, 5.2.2, 5.2.3, 5.2.4, 5.2.5, 5.2.6, 5.2.7, 5.2.8, 5.2.9, 5.2.10, 5.2.11, 5.2.12, 5.2.13, 5.2.14, 5.3.0, 5.3.0 BETA1, 5.3.0 BETA2, 5.3.0 BETA3, 5.3.0 BETA4, 5.3.0 RC1, 5.3.1, 5.3.2, 5.3.3, 5.3.4, 5.3.5, 5.3.6, 5.3.7, 5.3.8, 5.3.9, 5.3.10, 5.3.11

CPE

External links
http://github.com/symfony/symfony/security/advisories/GHSA-q3j3-w37x-hq2q
http://github.com/symfony/symfony/releases/tag/v5.3.12
http://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487
http://github.com/symfony/symfony/pull/44243


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.


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