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Analysis of MSI’s NTIOlib

MSI ntiolib.sys/winio.sys local privilege escalation:
So, it seems that not only ASUS drivers allows unprivileged reading and writing to physical memory. Just a few months ago I was looking at the drivers that are loaded on my machine, and I found small MSI driver called NTIOLib_X64.sys. Out of curiosity I’ve looked at it in IDA and it turned out that it has almost the same functionality as the ASMMAP/ASMMAP64 ASUS drivers. I’ve tried to contact MSI through various different channels, but I haven’t really get past their customer support, so I’m not sure if anyone from the development team is aware of this design flaw. After almost 4 months I decided to publish my findings here. […]

MSI ntiolib.sys/winio.sys local privilege escalation

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