{"id":"UBUNTU-CVE-2016-3120","details":"The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.","modified":"2026-04-22T10:39:47.543821Z","published":"2016-08-01T02:59:00Z","upstream":["CVE-2016-3120"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-3120"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-3120"}],"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_version":"1.12+dfsg-2ubuntu5.4","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":"libkrad0"},{"binary_version":"1.12+dfsg-2ubuntu5.4","binary_name":"libkrb5-3"},{"binary_version":"1.12+dfsg-2ubuntu5.4","binary_name":"libkrb5support0"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-3120.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_version":"1.13.2+dfsg-5ubuntu2.1","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":"libkrad0"},{"binary_version":"1.13.2+dfsg-5ubuntu2.1","binary_name":"libkrb5-3"},{"binary_version":"1.13.2+dfsg-5ubuntu2.1","binary_name":"libkrb5support0"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-3120.json"}}],"schema_version":"1.7.5","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"}]}