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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux Kernel Divide-by-Zero Error in tcp_disconnect() Lets Local Users Cause Denial of Service Conditions on the Target System
SecurityTracker Alert ID:  1039549
SecurityTracker URL:  http://securitytracker.com/id/1039549
CVE Reference:   CVE-2017-14106   (Links to External Site)
Date:  Oct 11 2017
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the Linux kernel. A local user can cause denial of service conditions on the target system.

A local user can trigger a divide-by-zero error in the tcp_disconnect() function in net/ipv4/tcp.c and cause a kernel panic.

Andrey Konovalov of Google reported this vulnerability.

Impact:   A local user can cause the target system to crash.
Solution:   The vendor has issued a source code fix [in May 2017], available at:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=499350a5a6e7512d9ed369ed63a4244b6536f4f8

Vendor URL:  www.kernel.org/ (Links to External Site)
Cause:   Exception handling error

Message History:   This archive entry has one or more follow-up message(s) listed below.
Oct 11 2017 (Ubuntu Issues Fix) Linux Kernel Divide-by-Zero Error in tcp_disconnect() Lets Local Users Cause Denial of Service Conditions on the Target System
Ubuntu has issued a fix for Ubuntu Linux 14.04 LTS.
Oct 11 2017 (Ubuntu Issues Fix) Linux Kernel Divide-by-Zero Error in tcp_disconnect() Lets Local Users Cause Denial of Service Conditions on the Target System
Ubuntu has issued a fix for Ubuntu Linux 12.04 ESM.



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