Researchers say BlackNurse attacks are low bandwidth (18Mbps) and can still knock offline many of today’s firewalls.

Trusted Mac OS X firewall Little Snitch is vulnerable to local privilege escalation attacks that could give criminals the ability plant rootkits and keyloggers on some El Capitan systems. The Little Snitch firewall vulnerability was found by Synack Director of Research and well-known OS X hacker Patrick Wardle. Affected are 3.x versions of the Little...