shutterstock_32990755FreeBSD has patched a denial-of-service vulnerability that could affect a host of third-party packages built atop the UNIX-like operating system.

The vulnerability—found in the way FreeBSD processes TCP packets—was discovered by a member of Juniper Networks’ incident response team. FreeBSD’s advisory warns that a hacker spoofing IP traffic can “tear down” a TCP connection with only two packets if they have knowledge of the target network and both TPC port numbers.

“When a segment with the SYN flag for an already existing connection arrives, the TCP stack tears down the connection, bypassing a check that the sequence number in the segment is in the expected window,” the advisory said.

See more at: http://threatpost.com/freebsd-patches-dos-vulnerability