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Category:   OS (UNIX)  >   Apple macOS/OS X Vendors:   Apple
Apple OS X DRAM "Rowhammer" Memory Bit Flipping Flaw Lets Local Users Gain Root Privileges
SecurityTracker Alert ID:  1032755
SecurityTracker URL:  http://securitytracker.com/id/1032755
CVE Reference:   CVE-2015-3693   (Links to External Site)
Date:  Jun 30 2015
Impact:   Root access via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 10.8.5, 10.9.5, 10.10 to 10.10.3
Description:   A vulnerability was reported in Apple OS X. A local user can obtain elevated privileges on the target system.

A local user can run a program that repeatedly accesses a row of memory to cause bits in adjacent rows to flip. This can be exploited to execute arbitrary code on the target system with kernel-level privileges.

Double data rate type 3 (DDR3) DRAM components from multiple vendors are affected.

This vulnerability is known as the DRAM "Rowhammer" vulnerability.

The original advisory, including demonstration exploit code, is available at:

http://googleprojectzero.blogspot.com/2015/03/exploiting-dram-rowhammer-bug-to-gain.html

Mark Seaborn and Thomas Dullien reported this vulnerability via Google Project Zero, based on research in 2014 by Yoongu Kim et al.

Impact:   A local user can obtain kernel-level privileges on the target system.
Solution:   The vendor has issued a fix (Security Update 2015-001, OS X 10.10.4).

The vendor's advisories are available at:

https://support.apple.com/kb/HT204934
https://support.apple.com/kb/HT204942

Vendor URL:  support.apple.com/kb/HT204934 (Links to External Site)
Cause:   State error

Message History:   None.


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