{"id":"UBUNTU-CVE-2018-8777","details":"In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker can pass a large HTTP request with a crafted header to WEBrick server or a crafted body to WEBrick server/handler and cause a denial of service (memory consumption).","modified":"2026-04-22T13:22:43.349719Z","published":"2018-04-03T00:00:00Z","related":["USN-3685-1"],"upstream":["CVE-2018-8777"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-8777"},{"type":"REPORT","url":"https://www.ruby-lang.org/en/news/2018/03/28/large-request-dos-in-webrick-cve-2018-8777/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3685-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-8777"}],"affected":[{"package":{"name":"ruby1.9.1","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/ruby1.9.1@1.9.3.484-2ubuntu1.12?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.3.484-2ubuntu1.12"}]}],"versions":["1.9.3.194-8.1ubuntu2","1.9.3.448-1ubuntu1","1.9.3.448-1ubuntu2","1.9.3.484-1ubuntu1","1.9.3.484-1ubuntu2","1.9.3.484-2ubuntu1","1.9.3.484-2ubuntu1.1","1.9.3.484-2ubuntu1.2","1.9.3.484-2ubuntu1.3","1.9.3.484-2ubuntu1.5","1.9.3.484-2ubuntu1.6","1.9.3.484-2ubuntu1.7","1.9.3.484-2ubuntu1.8","1.9.3.484-2ubuntu1.10","1.9.3.484-2ubuntu1.11"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.9.3.484-2ubuntu1.12","binary_name":"libruby1.9.1"},{"binary_version":"1.9.3.484-2ubuntu1.12","binary_name":"libtcltk-ruby1.9.1"},{"binary_version":"1.9.3.484-2ubuntu1.12","binary_name":"ri1.9.1"},{"binary_version":"1.9.3.484-2ubuntu1.12","binary_name":"ruby1.9.1"},{"binary_version":"1.9.3.484-2ubuntu1.12","binary_name":"ruby1.9.1-examples"},{"binary_version":"1.9.3.484-2ubuntu1.12","binary_name":"ruby1.9.1-full"},{"binary_version":"1.9.3.484-2ubuntu1.12","binary_name":"ruby1.9.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-8777.json"}},{"package":{"name":"ruby2.0","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/ruby2.0@2.0.0.484-1ubuntu2.10?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0.484-1ubuntu2.10"}]}],"versions":["2.0.0.299-2","2.0.0.343-1","2.0.0.343-1ubuntu1","2.0.0.353-1","2.0.0.353-1ubuntu1","2.0.0.484-1ubuntu1","2.0.0.484-1ubuntu2","2.0.0.484-1ubuntu2.1","2.0.0.484-1ubuntu2.2","2.0.0.484-1ubuntu2.4","2.0.0.484-1ubuntu2.5","2.0.0.484-1ubuntu2.6","2.0.0.484-1ubuntu2.8","2.0.0.484-1ubuntu2.9"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.0.0.484-1ubuntu2.10","binary_name":"libruby2.0"},{"binary_version":"2.0.0.484-1ubuntu2.10","binary_name":"ruby2.0"},{"binary_version":"2.0.0.484-1ubuntu2.10","binary_name":"ruby2.0-tcltk"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-8777.json"}},{"package":{"name":"ruby2.3","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ruby2.3@2.3.1-2~16.04.10?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.1-2~16.04.10"}]}],"versions":["2.3.0-1","2.3.0-2","2.3.0-4ubuntu2","2.3.0-4ubuntu3","2.3.0-5ubuntu1","2.3.1-2~16.04","2.3.1-2~16.04.2","2.3.1-2~16.04.4","2.3.1-2~16.04.5","2.3.1-2~16.04.6","2.3.1-2~16.04.7","2.3.1-2~16.04.9"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.3.1-2~16.04.10","binary_name":"libruby2.3"},{"binary_version":"2.3.1-2~16.04.10","binary_name":"ruby2.3"},{"binary_version":"2.3.1-2~16.04.10","binary_name":"ruby2.3-tcltk"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-8777.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}