EMET stands for Enhanced Mitigation Experience Toolkit – and it is a tool that you MUST have installed on your Windows PC.
EMET is a utility that helps prevent vulnerabilities in software from being successfully exploited.EMET achieves this goal by using security mitigation technologies.
These technologies function as special protections and obstacles that an exploit author must defeat to exploit software vulnerabilities. These security mitigation technologies do not guarantee that vulnerabilities cannot be exploited. However, they work to make exploitation as difficult as possible to perform. For more information about EMET, click the following article number to view the article in the Microsoft Knowledge Base:
When EMET mitigations are applied to certain software or certain kinds of software, compatibility issues may occur because the protected software behaves similarly to how an exploit would behave. This article describes the kind of software that usually presents compatibility issues with EMET’s mitigations and a list of products that exhibited compatibility issues with one or more of the mitigations that are offered by EMET.
Java and EMET
While I was installing a software that was needing JAVA, EMET popped up several time with an error:
EMET version 5.5.5871.31892
EMET detected EAF mitigation in javaw.exe
EAF check failed:
Application : C:\Program Files (x86)\Java\jre1.6.0_02\bin\javaw.exe
User Name : DEVMASTER\sorin
Session ID : 1
PID : 0x2B1C (11036)
TID : 0xB48 (2888)
Module : N/A
Mod Base : 0x00000000
Mod Address : 0x004804CE
Mem Address : 0x77A242CC
So, what does this mean?
EAF stands for: Export Address Table Access Filtering
Apparently… nothing. According to this Technet forum thread , EMET has known compatibility issues with .. a lot of applications: Dropbox, Java, Skype, various Apple programs and the list is very big.
This made me curious, since I was running with default settings.
On the above website I see even a note:
ǂ EMET mitigations might be incompatible with Oracle Java when they are run by using settings that reserve a large chunk of memory for the virtual machine (that is, by using the -Xms option).
In order to be able to do something when you run into such issues, you need to configure EMET to not block the application but just to audit it. (see in the above screenshot – top right corner)
More on EMET here: https://technet.microsoft.com/en-us/security/jj653751
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