Vulnerability Description
Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack. Configurations are affected when mod_proxy is enabled along with some form of RewriteRule or ProxyPassMatch in which a non-specific pattern matches some portion of the user-supplied request-target (URL) data and is then re-inserted into the proxied request-target using variable substitution. For example, something like: RewriteEngine on RewriteRule "^/here/(.*)" "http://example.com:8080/elsewhere?$1"; [P] ProxyPassReverse /here/ http://example.com:8080/ Request splitting/smuggling could result in bypass of access controls in the proxy server, proxying unintended URLs to existing origin servers, and cache poisoning. Users are recommended to update to at least version 2.4.56 of Apache HTTP Server.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Http Server | >= 2.4.0, <= 2.4.55 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/176334/Apache-2.4.55-mod_proxy-HTTP-Request
- https://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html
- https://security.gentoo.org/glsa/202309-01
- http://packetstormsecurity.com/files/176334/Apache-2.4.55-mod_proxy-HTTP-Request
- https://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html
- https://security.gentoo.org/glsa/202309-01
FAQ
What is CVE-2023-25690?
CVE-2023-25690 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack. Configurations are affected when mod_proxy is enabled along with some form ...
How severe is CVE-2023-25690?
CVE-2023-25690 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2023-25690?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Http Server.