Linux Kernel TCP Sequence Number Generation Security Weakness
Medium Nessus Plugin ID 56283
SynopsisIt may be possible to predict TCP/IP Initial Sequence Numbers for the remote host.
DescriptionThe Linux kernel is prone to a security weakness related to TCP sequence number generation. Attackers can exploit this issue to inject arbitrary packets into TCP sessions using a brute-force attack.
An attacker may use this vulnerability to create a denial of service condition or a man-in-the-middle attack.
Note that this plugin may fire as a result of a network device (such as a load balancer, VPN, IPS, transparent proxy, etc.) that is vulnerable and that re-writes TCP sequence numbers, rather than the host itself being vulnerable.
SolutionContact the OS vendor for a Linux kernel update / patch.