Quagga is a TCP/IP based routing software suite. The Quagga bgpd daemonimplements the BGP (Border Gateway Protocol) routing protocol.A stack-based buffer overflow flaw was found in the way the Quagga bgpddaemon processed certain BGP Route Refresh (RR) messages. A configured BGPpeer could send a specially-crafted BGP message, causing bgpd on a targetsystem to crash or, possibly, execute arbitrary code with the privileges ofthe user running bgpd. (CVE-2010-2948)Note: On Red Hat Enterprise Linux 5 it is not possible to exploitCVE-2010-2948 to run arbitrary code as the overflow is blocked byFORTIFY_SOURCE.Multiple NULL pointer dereference flaws were found in the way the Quaggabgpd daemon processed certain specially-crafted BGP messages. A configuredBGP peer could crash bgpd on a target system via specially-crafted BGPmessages. (CVE-2007-4826)Users of quagga should upgrade to these updated packages, which containbackported patches to correct these issues. After installing the updatedpackages, the bgpd daemon must be restarted for the update to take effect.