Type Confusion in coreruleset

1) Type Confusion

EUVDB-ID: #VU78624

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-38199

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected application does not block multiple Content-Type headers. A remote attacker can pass specially crafted data to the application, trigger a type confusion error and bypass a WAF.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OWASP ModSecurity Core Rule Set (CRS): 3.0.0 - 3.3.4

External links

http://github.com/coreruleset/coreruleset/issues/3191
http://github.com/coreruleset/coreruleset/pull/3237
http://github.com/advisories/GHSA-662c-vg67-m327

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.