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Anyone else running into stack cookie issues when mapping custom drivers?
Lately, I have been trying to push my own kernel driver using kdmapper, but I keep hitting a hard BSOD during the "fixing stack cookie" phase. It happens regardless of whether I use my own compiled base or other known sources I have been testing.
I suspect the issue stems from how the stack canary is being handled or potentially an oversight in the relocation/entry point execution within the mapped memory. I have checked the usual suspects like manual mapping procedures, but the stability is just not there.
Technical breakdown of the struggle:
Is anyone here familiar with the specific quirks of fixing these cookies manually? Are you guys handling the `__security_cookie` initialization inside the entry point, or are you patching the caller to avoid the check entirely? I would rather not disable security features globally if I can avoid it, but I need this thing to stop bugging out on initialization.
Let me know if you have tips on debugging this without triggering a total system hang or if there is a cleaner way to handle the relocation of the cookie in the driver image. Has anyone found a reliable way to resolve these BSODs while keeping the driver UD? Drop your experiences or fix suggestions below.
Lately, I have been trying to push my own kernel driver using kdmapper, but I keep hitting a hard BSOD during the "fixing stack cookie" phase. It happens regardless of whether I use my own compiled base or other known sources I have been testing.
I suspect the issue stems from how the stack canary is being handled or potentially an oversight in the relocation/entry point execution within the mapped memory. I have checked the usual suspects like manual mapping procedures, but the stability is just not there.
Technical breakdown of the struggle:
- The Crash: Immediate BSOD during the transition phase after the driver is mapped into kernel space.
- The Context: I am trying to bypass standard loading checks to keep the driver footprint minimal and avoid detection during the initial handshake.
- The Variable: I have tried both custom implementations and standard mapper builds, yet the stack corruption persists across different environments.
Is anyone here familiar with the specific quirks of fixing these cookies manually? Are you guys handling the `__security_cookie` initialization inside the entry point, or are you patching the caller to avoid the check entirely? I would rather not disable security features globally if I can avoid it, but I need this thing to stop bugging out on initialization.
Let me know if you have tips on debugging this without triggering a total system hang or if there is a cleaner way to handle the relocation of the cookie in the driver image. Has anyone found a reliable way to resolve these BSODs while keeping the driver UD? Drop your experiences or fix suggestions below.
