Critical severity9.8NVD Advisory· Published Mar 7, 2023· Updated Jun 17, 2026
CVE-2023-25690
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
46cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*range: >=2.4.0,<=2.4.55
- (no CPE)range: 2.4.0 - 2.4.55
- (no CPE)range: 2.4.0
- osv-coords43 versionspkg:bitnami/apachepkg:rpm/almalinux/httpdpkg:rpm/almalinux/httpd-corepkg:rpm/almalinux/httpd-develpkg:rpm/almalinux/httpd-filesystempkg:rpm/almalinux/httpd-manualpkg:rpm/almalinux/httpd-toolspkg:rpm/almalinux/mod_http2pkg:rpm/almalinux/mod_ldappkg:rpm/almalinux/mod_luapkg:rpm/almalinux/mod_mdpkg:rpm/almalinux/mod_proxy_htmlpkg:rpm/almalinux/mod_sessionpkg:rpm/almalinux/mod_sslpkg:rpm/opensuse/apache2&distro=openSUSE%20Leap%2015.4pkg:rpm/opensuse/apache2&distro=openSUSE%20Tumbleweedpkg:rpm/suse/apache2&distro=SUSE%20Enterprise%20Storage%207pkg:rpm/suse/apache2&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-ESPOSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP4pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP4pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP4pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2015%20SP3pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-ESPOSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/apache2&distro=SUSE%20Manager%20Proxy%204.2pkg:rpm/suse/apache2&distro=SUSE%20Manager%20Server%204.2pkg:rpm/suse/apache2&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/apache2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
>= 2.4.0, < 2.4.56+ 42 more
- (no CPE)range: >= 2.4.0, < 2.4.56
- (no CPE)range: < 2.4.53-7.el9_1.5
- (no CPE)range: < 2.4.53-7.el9_1.5
- (no CPE)range: < 2.4.53-7.el9_1.5
- (no CPE)range: < 2.4.53-7.el9_1.5
- (no CPE)range: < 2.4.53-7.el9_1.5
- (no CPE)range: < 2.4.53-7.el9_1.5
- (no CPE)range: < 1.15.19-3.el9_1.5
- (no CPE)range: < 2.4.53-7.el9_1.5
- (no CPE)range: < 2.4.53-7.el9_1.5
- (no CPE)range: < 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa
- (no CPE)range: < 1:2.4.53-7.el9_1.5
- (no CPE)range: < 2.4.53-7.el9_1.5
- (no CPE)range: < 1:2.4.53-7.el9_1.5
- (no CPE)range: < 2.4.51-150400.6.11.1
- (no CPE)range: < 2.4.56-1.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.33-150000.3.75.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.51-150400.6.11.1
- (no CPE)range: < 2.4.51-150400.6.11.1
- (no CPE)range: < 2.4.51-150400.6.11.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.23-29.97.1
- (no CPE)range: < 2.4.23-29.97.1
- (no CPE)range: < 2.4.23-29.97.1
- (no CPE)range: < 2.4.51-35.25.1
- (no CPE)range: < 2.4.33-150000.3.75.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.23-29.97.1
- (no CPE)range: < 2.4.51-35.25.1
- (no CPE)range: < 2.4.33-150000.3.75.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.51-35.25.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.51-150200.3.56.1
- (no CPE)range: < 2.4.23-29.97.1
- (no CPE)range: < 2.4.23-29.97.1
Patches
Vulnerability mechanics
References
4News mentions
0No linked articles in our index yet.