Red Hat Security Advisory: bind security update
bind: failure to clear existing RRSIG records when a NO DATA is negatively cached could DoS named bind: key algorithm rollover may mark secure answers as insecure Bind: DoS (assertion failure) via a DNS query with bad signatures
cpe:/o:redhat:enterprise_linux:5::client cpe:/o:redhat:enterprise_linux:5::client_workstation cpe:/o:redhat:enterprise_linux:5::server