{"id":"UBUNTU-CVE-2020-11985","details":"IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rewrite rules, an attacker could spoof their IP address for logging and PHP scripts. Note this issue was fixed in Apache HTTP Server 2.4.24 but was retrospectively allocated a low severity CVE in 2020.","modified":"2026-07-22T20:45:47.881458431Z","published":"2020-08-07T16:15:00Z","upstream":["CVE-2020-11985"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-11985"},{"type":"REPORT","url":"https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-11985"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2020/08/07/2"},{"type":"REPORT","url":"https://httpd.apache.org/security/vulnerabilities_24.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-11985"}],"affected":[{"package":{"name":"apache2","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.6-2ubuntu2","2.4.6-2ubuntu3","2.4.6-2ubuntu4","2.4.7-1ubuntu1","2.4.7-1ubuntu2","2.4.7-1ubuntu3","2.4.7-1ubuntu4","2.4.7-1ubuntu4.1","2.4.7-1ubuntu4.4","2.4.7-1ubuntu4.5","2.4.7-1ubuntu4.6","2.4.7-1ubuntu4.7","2.4.7-1ubuntu4.8","2.4.7-1ubuntu4.9","2.4.7-1ubuntu4.10","2.4.7-1ubuntu4.11","2.4.7-1ubuntu4.13","2.4.7-1ubuntu4.15","2.4.7-1ubuntu4.16","2.4.7-1ubuntu4.17","2.4.7-1ubuntu4.18","2.4.7-1ubuntu4.19","2.4.7-1ubuntu4.20","2.4.7-1ubuntu4.21","2.4.7-1ubuntu4.22","2.4.7-1ubuntu4.22+esm1","2.4.7-1ubuntu4.22+esm2","2.4.7-1ubuntu4.22+esm3","2.4.7-1ubuntu4.22+esm4","2.4.7-1ubuntu4.22+esm5","2.4.7-1ubuntu4.22+esm6","2.4.7-1ubuntu4.22+esm8","2.4.7-1ubuntu4.22+esm9","2.4.7-1ubuntu4.22+esm10","2.4.7-1ubuntu4.22+esm12","2.4.7-1ubuntu4.22+esm13","2.4.7-1ubuntu4.22+esm14","2.4.7-1ubuntu4.22+esm15"],"ecosystem_specific":{"binaries":[{"binary_name":"apache2","binary_version":"2.4.7-1ubuntu4.22+esm15"},{"binary_name":"apache2-bin","binary_version":"2.4.7-1ubuntu4.22+esm15"},{"binary_name":"apache2-data","binary_version":"2.4.7-1ubuntu4.22+esm15"},{"binary_version":"2.4.7-1ubuntu4.22+esm15","binary_name":"apache2-mpm-event"},{"binary_name":"apache2-mpm-itk","binary_version":"2.4.7-1ubuntu4.22+esm15"},{"binary_name":"apache2-mpm-prefork","binary_version":"2.4.7-1ubuntu4.22+esm15"},{"binary_name":"apache2-mpm-worker","binary_version":"2.4.7-1ubuntu4.22+esm15"},{"binary_version":"2.4.7-1ubuntu4.22+esm15","binary_name":"apache2-suexec"},{"binary_name":"apache2-suexec-custom","binary_version":"2.4.7-1ubuntu4.22+esm15"},{"binary_name":"apache2-suexec-pristine","binary_version":"2.4.7-1ubuntu4.22+esm15"},{"binary_name":"apache2-utils","binary_version":"2.4.7-1ubuntu4.22+esm15"},{"binary_version":"2.4.7-1ubuntu4.22+esm15","binary_name":"apache2.2-bin"},{"binary_name":"libapache2-mod-macro","binary_version":"1:2.4.7-1ubuntu4.22+esm15"},{"binary_name":"libapache2-mod-proxy-html","binary_version":"1:2.4.7-1ubuntu4.22+esm15"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11985.json"}},{"package":{"name":"apache2","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/apache2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.18-2ubuntu3.15"}]}],"versions":["2.4.12-2ubuntu2","2.4.17-1ubuntu1","2.4.17-2ubuntu1","2.4.17-3ubuntu1","2.4.18-1ubuntu1","2.4.18-2ubuntu1","2.4.18-2ubuntu2","2.4.18-2ubuntu3","2.4.18-2ubuntu3.1","2.4.18-2ubuntu3.2","2.4.18-2ubuntu3.3","2.4.18-2ubuntu3.4","2.4.18-2ubuntu3.5","2.4.18-2ubuntu3.7","2.4.18-2ubuntu3.8","2.4.18-2ubuntu3.9","2.4.18-2ubuntu3.10","2.4.18-2ubuntu3.12","2.4.18-2ubuntu3.13","2.4.18-2ubuntu3.14"],"ecosystem_specific":{"binaries":[{"binary_name":"apache2","binary_version":"2.4.18-2ubuntu3.15"},{"binary_name":"apache2-bin","binary_version":"2.4.18-2ubuntu3.15"},{"binary_version":"2.4.18-2ubuntu3.15","binary_name":"apache2-data"},{"binary_name":"apache2-suexec-custom","binary_version":"2.4.18-2ubuntu3.15"},{"binary_name":"apache2-suexec-pristine","binary_version":"2.4.18-2ubuntu3.15"},{"binary_name":"apache2-utils","binary_version":"2.4.18-2ubuntu3.15"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11985.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:N/I:L/A:N"},{"type":"Ubuntu","score":"low"}]}