CVE-2023-25690
Published: 7 March 2023
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | fixed by r1908095 in 2.4.x |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
apache2 Launchpad, Ubuntu, Debian |
bionic |
Released
(2.4.29-1ubuntu4.27)
|
| focal |
Released
(2.4.41-4ubuntu3.14)
|
|
| jammy |
Released
(2.4.52-1ubuntu4.4)
|
|
| kinetic |
Released
(2.4.54-2ubuntu1.2)
|
|
| lunar |
Released
(2.4.55-1ubuntu2)
|
|
| trusty |
Needed
|
|
| upstream |
Released
(2.4.56)
|
|
| xenial |
Released
(2.4.18-2ubuntu3.17+esm10)
|
|
|
Patches: upstream: https://github.com/apache/httpd/commit/8789f6bb926fa4c33b4231a8444340515c82bdff upstream: https://github.com/apache/httpd/commit/8b93a6512f14f5f68887ddfe677e91233ed79fb0 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |