CVE-2023-25690
CVSS v3
9.8
CRITICAL
EPSS Score
67.0 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2023-03-07
Frequently asked questions
What is CVE-2023-25690?
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.
Is CVE-2023-25690 actively exploited?
Active exploitation of CVE-2023-25690 has not been confirmed. The EPSS score is 67.0%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-25690?
CVE-2023-25690 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2023-25690 affecting your environment?
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