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Apache: CVE-2023-25690: HTTP request splitting with mod_rewrite and mod_proxy

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Apache: CVE-2023-25690: HTTP request splitting with mod_rewrite and mod_proxy

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
03/07/2023
Created
11/30/2023
Added
11/29/2023
Modified
11/30/2023

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 onRewriteRule "^/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.

Solution(s)

  • apache-httpd-upgrade-latest

References

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