{"id":4292,"date":"2017-11-21T00:36:00","date_gmt":"2017-11-20T23:36:00","guid":{"rendered":"http:\/\/borncity.com\/win\/?p=4292"},"modified":"2018-09-07T17:22:20","modified_gmt":"2018-09-07T15:22:20","slug":"aslr-fails-in-windows-8-8-1-and-10-but-there-is-a-fix","status":"publish","type":"post","link":"https:\/\/borncity.com\/win\/2017\/11\/21\/aslr-fails-in-windows-8-8-1-and-10-but-there-is-a-fix\/","title":{"rendered":"ASLR fails in Windows 8, 8.1 and 10 – but there is a fix"},"content":{"rendered":"

[German<\/a>]Here is Microsoft's next security glitch. Developers have made a mistake that causes the ASLR mechanism not always work properly in Windows 8, Windows 8.1 and Windows 10. But there's a fix.<\/p>\n

<\/p>\n

Address Space Layout Randomization (ASLR)<\/a> is a computer security technology designed to make it harder for attackers to exploit a buffer overflow. This technique is actually included in all modern operating systems. For Windows Vista, Microsoft has implemented ASLR throughout the entire system for the first time.<\/p>\n

Windows 10: ASLR is included in Defender<\/h2>\n

To enable the feature, users had to install Microsoft EMET on Windows Vista or Windows 7 to enable ASLR in system-wide and\/or application-specific states. However, EMET will be discontinued in 2018 and Microsoft has integrated its functions into Windows 10.<\/p>\n

\"ASLR<\/p>\n

In Windows Defender Security Center (accessible via Settings<\/em> app) under App & browser control <\/em>and subgroup Exploit protection settings<\/em>.<\/p>\n

A discovery during investigating an Office flaw<\/h2>\n

A few hours ago I've published the blog post Has Microsoft lost access to parts of Office source code?<\/a>, where Office Equation editor has been patched. Investigating this vulnerability, CERT\/CC vulnerability analyst Will Dormann discovered that ASLR did not randomly randomize the storage code locations of application binary files under certain conditions. While in Windows 7 and EMET the memory addresses of loaded modules were random by ASLR on restarting Windows, this was no longer the case in Windows 10. Dormann published his findings in a Tweet<\/a>.<\/p>\n

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Actually, with Windows 7 and EMET System-wide ASLR, the loaded address for eqnedt32.exe is different on every reboot. But with Windows 10 with either EMET or WDEG, the base for eqnedt32.exe is 0x10000 EVERY TIME.
\nConclusion: Win10 cannot be enforce ASLR as well as Win7! pic.twitter.com\/Jp10nqk1NQ<\/a><\/p>\n

\u2014 Will Dormann (@wdormann) 15. November 2017<\/a><\/p><\/blockquote>\n