Running a data allocation, which is exactly what DEP isĭesigned to stop. Got to decompress the executable, so it allocates aīunch of data memory into which it decompresses theĬompressed executable, and then it runs it. Wouldn’t because naturally an executable compressor has It’sīecause it uses an EXE packer, an executable compression But it won’t launch, Windows blocks it from runs fine in opt-out mode, even if it has not been That is, you would imagine thatĪlways-on mode would be the same as opting out if you User to user discussion and support for UltraEdit, UltraCompare, UEStudio, and other UltraEdit applications. "I can’t find any documentation on Microsoft’s siteĪnywhere, because we’re seeing a difference betweenĪlways-on and opt-out. Strings is found, DEP will be turned OFF for thisĪpplication by windows. Microsoft just coded a backdoor used only in OPTOUT.īascially Microsoft checks the executable header for a "IrfanView was not using any trick to evade DEP. "Hardware DEP has a backdoor" by Fabrice Roux. In the case of IrfanView, for which Steve Gibson observed the same difference as I did for UltraEdit (see the question), the difference is caused by a non-DEP aware EXE packer (ASPack) that Microsoft coded a backdoor for. The processor does not run in PAE mode unless the /PAE option is present in the Boot.ini file.įor question 1: I think this difference is caused by the backdoors that Microsoft has put into hardware DEP for OptOut, according to Fabrice Roux (see below). Programs that have been opted-out by using the Application Compatibility Toolkit run with DEP applied.ĪlwaysOff This setting does not provide any DEP coverage for any part of the system, regardless of hardware DEP support. System compatibility fixes for DEP do not take effect. The exceptions list to exempt specific programs from DEP protection is not available. All processes always run with DEP applied. System compatibility fixes, or shims, for DEP do take effect.ĪlwaysOn This setting provides full DEP coverage for the whole system. Information technology (IT) professionals can use the Application Compatibility Toolkit to "opt-out" one or more programs from DEP protection. You can manually create a list of specific programs that do not have DEP applied by using the System dialog box in Control Panel. And the number of files you’re working on may even be beyond that. OptOut DEP is enabled by default for all processes. UltraEdit is home to hundreds, if not thousands, of commands and settings. On systems with processors that can implement hardware-enforced DEP, DEP is enabled by default for limited system binaries and programs that "opt-in." With this option, only Windows system binaries are covered by DEP by default. OptIn This setting is the default configuration.
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