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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux Kernel Protocol Identifier Bug Lets Local Users Cause Denial of Service Conditions on the Target System
SecurityTracker Alert ID:  1034892
SecurityTracker URL:  http://securitytracker.com/id/1034892
CVE Reference:   CVE-2015-8543   (Links to External Site)
Date:  Jan 30 2016
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 supply a specially crafted protocol identifier to AF_INET and AF_INET6 sockets that only support 8-bit protocol identifiers to trigger a null pointer dereference and cause the target system to crash.

On systems that support CLONE_NEWUSER, a local user can exploit this flaw. A local user with CAP_NET_RAW capability can also exploit this flaw.

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

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=79462ad02e861803b3840cc782248c7359451cd9

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

Message History:   This archive entry has one or more follow-up message(s) listed below.
Feb 24 2016 (Ubuntu Issues Fix) Linux Kernel Protocol Identifier Bug Lets Local Users Cause Denial of Service Conditions on the Target System
Ubuntu has issued a fix for Ubuntu Linux 14.04 LTS.
May 11 2016 (Red Hat Issues Fix) Linux Kernel Protocol Identifier Bug Lets Local Users Cause Denial of Service Conditions on the Target System
Red Hat has issued a fix for Red Hat Enterprise Linux 6.



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