9.8
CRITICAL
CVE-2023-38199
Apache Coreruleset ModSecurity Content-Type Header Bypass
Description

coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka "Content-Type confusion" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.

INFO

Published Date :

July 13, 2023, 3:15 a.m.

Last Modified :

Sept. 5, 2023, 4:15 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2023-38199 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Owasp coreruleset
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-38199.

URL Resource
https://github.com/coreruleset/coreruleset/issues/3191 Issue Tracking Patch
https://github.com/coreruleset/coreruleset/pull/3237 Issue Tracking

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-38199 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-38199 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Sep. 05, 2023

    Action Type Old Value New Value
    Changed Description coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not block multiple Content-Type headers, which might allow attackers to bypass a WAF with a crafted payload, aka "Content-Type confusion." This occurs when the web application relies on only the last Content-Type header. coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka "Content-Type confusion" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.
  • Initial Analysis by [email protected]

    Jul. 25, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://github.com/coreruleset/coreruleset/issues/3191 No Types Assigned https://github.com/coreruleset/coreruleset/issues/3191 Issue Tracking, Patch
    Changed Reference Type https://github.com/coreruleset/coreruleset/pull/3237 No Types Assigned https://github.com/coreruleset/coreruleset/pull/3237 Issue Tracking
    Added CWE NIST CWE-843
    Added CPE Configuration OR *cpe:2.3:a:owasp:coreruleset:*:*:*:*:*:*:*:* versions up to (including) 3.3.4
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-38199 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-38199 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.16 }} 0.02%

score

0.52671

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability