CloudLinux 7 and CloudLinux 6 Hybrid kernel version 3.10.0-714.10.2.lve184.108.40.206 is now available for download from our updates-testing repository.
- CLKRN-323: a flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets. A remote attacker could use this flaw to trigger time and calculation expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() functions by sending specially modified packets within ongoing TCP sessions which could lead to a CPU saturation and hence a denial of service on the system. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port, thus the attacks cannot be performed using spoofed IP addresses.
To install a new kernel, please use the following command:
yum install kernel-3.10.0-714.10.2.lve220.127.116.11.el7 --enablerepo=cloudlinux-updates-testing
CloudLinux 6 Hybrid:
yum install kernel-3.10.0-714.10.2.lve18.104.22.168.el6h --enablerepo=cloudlinux-hybrid-testing