{"id":"UBUNTU-CVE-2015-3183","details":"The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.","modified":"2026-04-22T10:06:58.350636Z","published":"2015-07-20T00:00:00Z","related":["USN-2686-1"],"upstream":["CVE-2015-3183"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-3183"},{"type":"REPORT","url":"https://www.apache.org/dist/httpd/Announcement2.4.txt"},{"type":"REPORT","url":"https://www.apache.org/dist/httpd/CHANGES_2.4.16"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2686-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-3183"}],"affected":[{"package":{"name":"apache2","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/apache2@2.4.7-1ubuntu4.5?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1ubuntu4.5"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-bin"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-data"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-mpm-event"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-mpm-itk"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-mpm-prefork"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-mpm-worker"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-suexec"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-suexec-custom"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-suexec-pristine"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2-utils"},{"binary_version":"2.4.7-1ubuntu4.5","binary_name":"apache2.2-bin"},{"binary_version":"1:2.4.7-1ubuntu4.5","binary_name":"libapache2-mod-macro"},{"binary_version":"1:2.4.7-1ubuntu4.5","binary_name":"libapache2-mod-proxy-html"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-3183.json"}}],"schema_version":"1.7.5","severity":[{"type":"Ubuntu","score":"medium"}]}