{"id":"CVE-2023-25690","state":"PUBLISHED","title":"Apache HTTP Server: HTTP request splitting with mod_rewrite and mod_proxy","description":"Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack.\n\n\n\n\nConfigurations are affected when mod_proxy is enabled along with some form of RewriteRule\n or ProxyPassMatch in which a non-specific pattern matches\n some portion of the user-supplied request-target (URL) data and is then\n re-inserted into the proxied request-target using variable \nsubstitution. For example, something like:\n\n\n\n\nRewriteEngine on\nRewriteRule \"^/here/(.*)\" \"http://example.com:8080/elsewhere?$1\"; [P]\nProxyPassReverse /here/ http://example.com:8080/\n\n\nRequest 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.","publishedAt":"2023-03-07T15:09:03.080Z","updatedAt":"2025-12-18T15:37:41.866Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache HTTP Server"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache HTTP Server","defaultStatus":"unknown","versions":[{"version":"2.4.0","status":"affected","lessThanOrEqual":"2.4.55","versionType":"semver"}]}],"references":["https://httpd.apache.org/security/vulnerabilities_24.html","https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html","https://security.gentoo.org/glsa/202309-01","http://packetstormsecurity.com/files/176334/Apache-2.4.55-mod_proxy-HTTP-Request-Smuggling.html"],"weaknesses":["CWE-444"],"ingestedAt":"2026-10-29T20:05:43.909Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/25xxx/CVE-2023-25690.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-25690","state":"PUBLISHED","datePublished":"2023-03-07T15:09:03.080Z","dateUpdated":"2025-12-18T15:37:41.866Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2023-02-12T13:28:31.657Z"},"containers":{"cna":{"title":"Apache HTTP Server: HTTP request splitting with mod_rewrite and mod_proxy","descriptions":[{"lang":"en","value":"Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack.\n\n\n\n\nConfigurations are affected when mod_proxy is enabled along with some form of RewriteRule\n or ProxyPassMatch in which a non-specific pattern matches\n some portion of the user-supplied request-target (URL) data and is then\n re-inserted into the proxied request-target using variable \nsubstitution. For example, something like:\n\n\n\n\nRewriteEngine on\nRewriteRule \"^/here/(.*)\" \"http://example.com:8080/elsewhere?$1\"; [P]\nProxyPassReverse /here/ http://example.com:8080/\n\n\nRequest 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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache HTTP Server","defaultStatus":"unknown","versions":[{"version":"2.4.0","status":"affected","lessThanOrEqual":"2.4.55","versionType":"semver"}]}],"references":[{"url":"https://httpd.apache.org/security/vulnerabilities_24.html","tags":["vendor-advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html"},{"url":"https://security.gentoo.org/glsa/202309-01"},{"url":"http://packetstormsecurity.com/files/176334/Apache-2.4.55-mod_proxy-HTTP-Request-Smuggling.html"}],"metrics":[{"other":{"content":{"text":"important"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-444","description":"CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2024-01-02T16:06:10.239Z"},"credits":[{"lang":"en","type":"finder","value":"Lars Krapf of Adobe"}],"source":{"discovery":"UNKNOWN"},"timeline":[{"lang":"en","time":"2023-02-02T02:01:00.000Z","value":"reported"}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://httpd.apache.org/security/vulnerabilities_24.html","tags":["vendor-advisory","x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html","tags":["x_transferred"]},{"url":"https://security.gentoo.org/glsa/202309-01","tags":["x_transferred"]},{"url":"http://packetstormsecurity.com/files/176334/Apache-2.4.55-mod_proxy-HTTP-Request-Smuggling.html","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T11:25:19.361Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-12-18T15:37:02.907036Z","id":"CVE-2023-25690","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-18T15:37:41.866Z"}}]}}}