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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
(Ubuntu Issues Fix) Linux Kernel TCP Reassembly Algorithm Lets Remote Users Consume Excessive CPU Resources on the Target System
SecurityTracker Alert ID:  1041496
SecurityTracker URL:  http://securitytracker.com/id/1041496
CVE Reference:   CVE-2018-5390   (Links to External Site)
Date:  Aug 16 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Ubuntu 14.04 LTS
Description:   A vulnerability was reported in the Linux kernel. A remote user can consume excessive CPU resources on the target system.

The system uses an inefficient TCP reassembly algorithm. A remote user can send specially crafted data via an established TCP connection to consume excessive CPU resources on the target system.

Juha-Matti Tilli (Aalto University, Department of Communications and Networking / Nokia Bell Labs) reported this vulnerability.

Impact:   A remote user can consume excessive CPU resources on the target system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://usn.ubuntu.com/usn/usn-3742-1

Vendor URL:  usn.ubuntu.com/usn/usn-3742-1 (Links to External Site)
Cause:   Resource error

Message History:   This archive entry is a follow-up to the message listed below.
Aug 7 2018 Linux Kernel TCP Reassembly Algorithm Lets Remote Users Consume Excessive CPU Resources on the Target System



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