{"id":"UBUNTU-CVE-2017-11368","details":"In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.","modified":"2025-09-08T16:44:19Z","published":"2017-08-09T18:29:00Z","upstream":["CVE-2017-11368"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-11368"},{"type":"REPORT","url":"https://github.com/krb5/krb5/pull/678/files"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-11368"}],"affected":[{"package":{"name":"krb5","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/krb5@1.12+dfsg-2ubuntu5.4?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.12+dfsg-2ubuntu5.4"}]}],"versions":["1.10.1+dfsg-6.1ubuntu1","1.11.3+dfsg-3ubuntu2","1.12+dfsg-2ubuntu1","1.12+dfsg-2ubuntu2","1.12+dfsg-2ubuntu3","1.12+dfsg-2ubuntu4","1.12+dfsg-2ubuntu4.2","1.12+dfsg-2ubuntu5","1.12+dfsg-2ubuntu5.1","1.12+dfsg-2ubuntu5.2","1.12+dfsg-2ubuntu5.3"],"ecosystem_specific":{"binaries":[{"binary_name":"krb5-admin-server","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"krb5-gss-samples","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"krb5-kdc","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"krb5-kdc-ldap","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"krb5-locales","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"krb5-multidev","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"krb5-otp","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"krb5-pkinit","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"krb5-user","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libgssapi-krb5-2","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libgssrpc4","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libk5crypto3","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libkadm5clnt-mit9","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libkadm5srv-mit8","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libkadm5srv-mit9","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libkdb5-7","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libkrad-dev","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libkrad0","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libkrb5-3","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libkrb5-dev","binary_version":"1.12+dfsg-2ubuntu5.4"},{"binary_name":"libkrb5support0","binary_version":"1.12+dfsg-2ubuntu5.4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-11368.json"}},{"package":{"name":"krb5","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/krb5@1.13.2+dfsg-5ubuntu2.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.13.2+dfsg-5ubuntu2.1"}]}],"versions":["1.13.2+dfsg-2","1.13.2+dfsg-3","1.13.2+dfsg-4","1.13.2+dfsg-5","1.13.2+dfsg-5ubuntu1","1.13.2+dfsg-5ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"krb5-admin-server","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"krb5-gss-samples","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"krb5-k5tls","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"krb5-kdc","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"krb5-kdc-ldap","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"krb5-locales","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"krb5-multidev","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"krb5-otp","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"krb5-pkinit","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"krb5-user","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libgssapi-krb5-2","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libgssrpc4","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libk5crypto3","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libkadm5clnt-mit9","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libkadm5srv-mit9","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libkdb5-8","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libkrad-dev","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libkrad0","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libkrb5-3","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libkrb5-dev","binary_version":"1.13.2+dfsg-5ubuntu2.1"},{"binary_name":"libkrb5support0","binary_version":"1.13.2+dfsg-5ubuntu2.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-11368.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}