{"id":"UBUNTU-CVE-2019-20372","details":"NGINX before 1.17.7, with certain error_page configurations, allows HTTP request smuggling, as demonstrated by the ability of an attacker to read unauthorized web pages in environments where NGINX is being fronted by a load balancer.","modified":"2026-02-04T03:24:50.787282Z","published":"2020-01-09T21:15:00Z","related":["USN-4235-1","USN-4235-2"],"upstream":["CVE-2019-20372"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-20372"},{"type":"REPORT","url":"https://bertjwregeer.keybase.pub/2019-12-10%20-%20error_page%20request%20smuggling.pdf"},{"type":"REPORT","url":"http://nginx.org/en/CHANGES"},{"type":"REPORT","url":"https://duo.com/docs/dng-notes#version-1.5.4-january-2020"},{"type":"REPORT","url":"https://github.com/kubernetes/ingress-nginx/pull/4859"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4235-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4235-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-20372"}],"affected":[{"package":{"name":"nginx","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/nginx@1.4.6-1ubuntu3.9+esm1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.6-1ubuntu3.9+esm1"}]}],"versions":["1.4.1-3ubuntu1","1.4.3-2ubuntu1","1.4.4-1ubuntu1","1.4.4-2ubuntu1","1.4.4-4ubuntu1","1.4.5-1ubuntu1","1.4.6-1ubuntu2","1.4.6-1ubuntu3","1.4.6-1ubuntu3.1","1.4.6-1ubuntu3.2","1.4.6-1ubuntu3.3","1.4.6-1ubuntu3.4","1.4.6-1ubuntu3.5","1.4.6-1ubuntu3.6","1.4.6-1ubuntu3.7","1.4.6-1ubuntu3.8","1.4.6-1ubuntu3.9"],"ecosystem_specific":{"availability":"Available 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subscription 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subscription required","binaries":[{"binary_name":"libnginx-mod-http-auth-pam","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-cache-purge","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-dav-ext","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-echo","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-fancyindex","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-headers-more-filter","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-lua","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-ndk","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-subs-filter","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-uploadprogress","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-upstream-fair","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-mail","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-nchan","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-rtmp","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"libnginx-mod-stream","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"nginx","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"nginx-common","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"nginx-core","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"nginx-extras","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"nginx-full","binary_version":"1.14.0-0ubuntu1.7"},{"binary_name":"nginx-light","binary_version":"1.14.0-0ubuntu1.7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20372.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}