{"id":"UBUNTU-CVE-2017-7668","details":"The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.","modified":"2026-04-22T12:32:11.345322Z","published":"2017-06-19T00:00:00Z","related":["USN-3340-1","USN-3373-1"],"upstream":["CVE-2017-7668"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-7668"},{"type":"REPORT","url":"https://lists.apache.org/thread.html/55a068b6a5eec0b3198ae7d96a7cb412352d0ffa7716612c5af3745b@%3Cdev.httpd.apache.org%3E"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3340-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3373-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-7668"}],"affected":[{"package":{"name":"apache2","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/apache2@2.4.7-1ubuntu4.16?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1ubuntu4.16"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"apache2","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"apache2-bin","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"apache2-data","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"apache2-mpm-event","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"apache2-mpm-itk","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"apache2-mpm-prefork","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"apache2-mpm-worker","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"apache2-suexec","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"apache2-suexec-custom","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"apache2-suexec-pristine","binary_version":"2.4.7-1ubuntu4.16"},{"binary_version":"2.4.7-1ubuntu4.16","binary_name":"apache2-utils"},{"binary_name":"apache2.2-bin","binary_version":"2.4.7-1ubuntu4.16"},{"binary_name":"libapache2-mod-macro","binary_version":"1:2.4.7-1ubuntu4.16"},{"binary_name":"libapache2-mod-proxy-html","binary_version":"1:2.4.7-1ubuntu4.16"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-7668.json"}},{"package":{"name":"apache2","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/apache2@2.4.18-2ubuntu3.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.18-2ubuntu3.3"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"apache2","binary_version":"2.4.18-2ubuntu3.3"},{"binary_name":"apache2-bin","binary_version":"2.4.18-2ubuntu3.3"},{"binary_name":"apache2-data","binary_version":"2.4.18-2ubuntu3.3"},{"binary_name":"apache2-suexec-custom","binary_version":"2.4.18-2ubuntu3.3"},{"binary_version":"2.4.18-2ubuntu3.3","binary_name":"apache2-suexec-pristine"},{"binary_name":"apache2-utils","binary_version":"2.4.18-2ubuntu3.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-7668.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:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}