CVE-2023-25690

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.

NVD

Severity: CRITICAL
CVE ID: CVE-2023-25690
CVSS Score: 9.8
CVSS Metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Refrence: NVDMITRE

Proof Of Concept

tbachvarova

Fix URL containing SPACES after Apache upgrade CVE-2023-25690

Refrence: GitHub

dhmosfunk

CVE 2023 25690 Proof of concept - mod_proxy vulnerable configuration on Apache HTTP Server versions 2.4.0 - 2.4.55 leads to HTTP Request Smuggling vulnerability.

Refrence: GitHub

thanhlam-attt

Refrence: GitHub