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Category:   OS (UNIX)  >   OpenBSD Kernel Vendors:   OpenBSD
OpenBSD Kernel Memory Free Error in wsmux_getmux() Lets Local Console Users Cause the Kernel to Crash
SecurityTracker Alert ID:  1038728
SecurityTracker URL:  http://securitytracker.com/id/1038728
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jun 21 2017
Impact:   Denial of service via local system, Not specified
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.0, 6.1
Description:   Two vulnerabilities were reported in OpenBSD Kernel. A local user can cause denial of service conditions on the target system. The impact of one vulnerability was not specified.

A local user can trigger an integer overflow in the sti(4) display driver. The impact was not specified. The hppa architecture is affected.

A local user on the console can trigger a memory free error in wsmux_getmux() and cause the kernel to crash.

Impact:   A local user can cause the target system to crash.

The impact of one vulnerability was not specified.

Solution:   The vendor has issued source code fixes, available at:

https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/027_sti.patch.sig
https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/028_wsmux.patch.sig

https://ftp.openbsd.org/pub/OpenBSD/patches/6.1/common/011_sti.patch.sig
https://ftp.openbsd.org/pub/OpenBSD/patches/6.1/common/012_wsmux.patch.sig

Vendor URL:  www.openbsd.org/errata61.html (Links to External Site)
Cause:   Access control error

Message History:   None.


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