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Category:   OS (UNIX)  >   OpenBSD Kernel Vendors:   OpenBSD
OpenBSD IO Port Permissions Bug Lets Local Users Cause Denial of Service Conditions
SecurityTracker Alert ID:  1041550
SecurityTracker URL:  http://securitytracker.com/id/1041550
CVE Reference:   CVE-2018-14775   (Links to External Site)
Date:  Aug 22 2018
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.2, 6.3
Description:   A vulnerability was reported in OpenBSD Kernel. A local user can cause denial of service conditions on the target system.

A local user can run a specially crafted application to trigger an access control flaw in tss_alloc() in 'sys/arch/i386/i386/gdt.c' and cause the system to crash.

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

https://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/020_ioport.patch.sig
https://ftp.openbsd.org/pub/OpenBSD/patches/6.3/common/015_ioport.patch.sig

Vendor URL:  www.openbsd.org/errata63.html (Links to External Site)
Cause:   Access control error

Message History:   None.


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