The kadm5randkeyprincipal3 function in lib/kadm5/srv/svrprincipal.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13 sends old keys in a response to a -randkey -keepold request, which allows remote authenticated users to forge tickets by leveraging administrative access.
{ "ubuntu_priority": "low", "availability": "No subscription required", "binaries": [ { "binary_name": "krb5-admin-server", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "krb5-doc", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "krb5-gss-samples", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "krb5-kdc", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "krb5-kdc-ldap", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "krb5-locales", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "krb5-multidev", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "krb5-otp", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "krb5-pkinit", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "krb5-user", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libgssapi-krb5-2", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libgssrpc4", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libk5crypto3", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkadm5clnt-mit9", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkadm5srv-mit8", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkadm5srv-mit9", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkdb5-7", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkrad-dev", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkrad0", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkrb5-3", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkrb5-dbg", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkrb5-dev", "binary_version": "1.12+dfsg-2ubuntu5.1" }, { "binary_name": "libkrb5support0", "binary_version": "1.12+dfsg-2ubuntu5.1" } ] }