Improper input validation in ModSecurity

1) Input validation error

EUVDB-ID: #VU72085

Risk: Medium

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

CVE-ID: CVE-2022-48279

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input when parsing HTTP multipart requests. A remote attacker can send specially crafted input to the application and bypass the Web Application Firewall.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ModSecurity: 2.9.0 - 3.0.7

External links

http://github.com/SpiderLabs/ModSecurity/pull/2797
http://github.com/SpiderLabs/ModSecurity/pull/2795
http://github.com/SpiderLabs/ModSecurity/releases/tag/v3.0.8
http://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/
http://github.com/SpiderLabs/ModSecurity/releases/tag/v2.9.6
http://lists.debian.org/debian-lts-announce/2023/01/msg00023.html

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.