Category Archives: Windows 8 and later always-on ASLR has zero entropy

VU#817544: Windows 8 and later fail to properly randomize every application if system-wide mandatory ASLR is enabled via EMET or Windows Defender Exploit Guard

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Microsoft Windows 8 introduced a change in how system-wide mandatory ASLR is implemented. This change requires system-wide bottom-up ASLR to be enabled for mandatory ASLR to receive entropy. Tools that enable system-wide ASLR without also setting bottom-up ASLR will fail to properly randomize executables that do not opt in to ASLR. Continue reading VU#817544: Windows 8 and later fail to properly randomize every application if system-wide mandatory ASLR is enabled via EMET or Windows Defender Exploit Guard→

VU#817544: Windows 8 and later fail to properly randomize all applications if system-wide mandatory ASLR is enabled via EMET or Windows Defender Exploit Guard

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Microsoft Windows 8 introduced a change in how system-wide mandatory ASLR is implemented. This change requires system-wide bottom-up ASLR to be enabled for mandatory ASLR to receive entropy. Tools that enable system-wide ASLR without also setting bottom-up ASLR will fail to properly randomize executables that do not opt in to ASLR. Continue reading VU#817544: Windows 8 and later fail to properly randomize all applications if system-wide mandatory ASLR is enabled via EMET or Windows Defender Exploit Guard→