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Category:   OS (UNIX)  >   OpenBSD Kernel Vendors:   OpenBSD
OpenBSD sys_mmap() Resource Bug Lets Local Users Cause Denial of Service Conditions on the Target System
SecurityTracker Alert ID:  1036318
SecurityTracker URL:  http://securitytracker.com/id/1036318
CVE Reference:   CVE-2016-6239, CVE-2016-6240, CVE-2016-6241   (Links to External Site)
Updated:  Jul 18 2016
Original Entry Date:  Jul 16 2016
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.8, 5.9
Description:   A vulnerability was reported in OpenBSD. A local user can cause denial of service conditions on the target system.

A local user can invoke the __MAP_NOFAULT mmap extension to trigger a flaw in sys_mmap() and cause excessive resource consumption and a system crash.

Impact:   A local user can cause denial of service conditions on the target system.
Solution:   The vendor has issued a patch, available at:

http://ftp.openbsd.org/pub/OpenBSD/patches/5.8/common/020_mmap.patch.sig
http://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/016_mmap.patch.sig

Vendor URL:  www.openbsd.org/errata59.html (Links to External Site)
Cause:   Resource error

Message History:   None.


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