Microsoft Windows 10 x64 RS2 win32kfull!bFill Pool Overflow

Credit: Anonymous
Risk: High
Local: Yes
Remote: No
CWE: CWE-264

CVSS Base Score: 7.2/10
Impact Subscore: 10/10
Exploitability Subscore: 3.9/10
Exploit range: Local
Attack complexity: Low
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

Exploits for the recently-patched win32kfull!bFill vulnerability. Executing the Palette or Bitmap exploit will give you SYSTEM privileges on the affected system. The exploits should work fine on Windows 10 x64 with Creators Update, build 15063.540 (latest version of Win10 before the release of Microsoft's September Updates). The Visual Studio solution contains three exploits: CVE-2016-3309_Reloaded_Bitmaps: Exploit using the Bitmaps technique CVE-2016-3309_Reloaded_Palettes: Exploit using the Palettes technique CVE-2016-3309_Reloaded_Deadlock: POC exploit showcasing the system deadlock which happens due to improved Handle validation We also published a blog post ( which goes into detail about the exploitation of this "wild" Pool-based overflow. Exploit:


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