{"id":"UBUNTU-CVE-2023-38199","details":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka \"Content-Type confusion\" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.","modified":"2026-05-20T16:13:46.515646465Z","published":"2023-07-13T03:15:00Z","upstream":["CVE-2023-38199"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-38199"},{"type":"REPORT","url":"https://github.com/coreruleset/coreruleset/issues/3191"},{"type":"REPORT","url":"https://github.com/coreruleset/coreruleset/pull/3237"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-38199"}],"affected":[{"package":{"name":"modsecurity-crs","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-crs?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.9-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.9-1","binary_name":"modsecurity-crs"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-38199.json"}},{"package":{"name":"modsecurity-crs","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-crs?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.0-3","3.0.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"modsecurity-crs","binary_version":"3.0.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-38199.json"}},{"package":{"name":"modsecurity-crs","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-crs?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.1-1","3.2.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"modsecurity-crs","binary_version":"3.2.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-38199.json"}},{"package":{"name":"modsecurity-crs","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-crs?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1","3.3.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"modsecurity-crs","binary_version":"3.3.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-38199.json"}},{"package":{"name":"modsecurity-crs","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-crs?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.5-1","3.3.5-2"],"ecosystem_specific":{"binaries":[{"binary_name":"modsecurity-crs","binary_version":"3.3.5-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-38199.json"}},{"package":{"name":"modsecurity-crs","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/modsecurity-crs?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.7-1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.3.7-1","binary_name":"modsecurity-crs"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-38199.json"}},{"package":{"name":"modsecurity-crs","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-crs?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.7-1","3.3.8-1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.3.8-1","binary_name":"modsecurity-crs"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-38199.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}