CVE-2025-62215 Vulnerability Analysis

Windows Kernel Race Condition / Double-Free Privilege Escalation の脆弱性調査プロジェクト。

Overview

Project Structure

.
├── README.md                           # This file
├── CLAUDE.md                           # Project context for Claude Code
├── report.md                           # Comprehensive vulnerability report
├── analysis.md                         # Static analysis of public (fake) PoC
├── TODO.md                             # Next steps and research plan
├── poc/
│   ├── exploit.h                       # Common definitions & undocumented types
│   ├── exploit.cpp                     # PoC skeleton (correct APIs)
│   └── Makefile                        # MSVC (nmake) build config
└── docs/
    ├── binary-acquisition.md           # How to obtain ntoskrnl.exe binaries
    ├── patch-analysis-guide.md         # IDA Pro + BinDiff analysis guide
    ├── detection-rules.md              # Sigma / Sysmon / ETW detection rules
    └── test-environment.md             # VM + WinDbg setup guide

Key Findings

Phase 1: Vulnerability Research

• CVE-2025-62215 is a real vulnerability patched in November 2025 Patch Tuesday
• Affects all supported Windows versions (10, 11, Server 2019/2022/2025)
• Actively exploited as a zero-day, registered in CISA KEV

Phase 1: Public PoC Analysis

• Public PoC (abrewer251/CVE-2025-62215_Windows_Kernel_PE) — fake/non-functional
  • Uses fictitious API (NtCreateKernelObject)
  • User-mode VirtualAlloc cannot spray kernel pool
  • No actual privilege escalation mechanism
  • No malware/backdoor elements detected

Phase 2: PoC Development (Current)

• Implemented PoC skeleton with correct Windows kernel APIs
• Working components: version check, VM detection, NtDll resolution, pool grooming, EPROCESS leak
• Blocked: Race condition trigger requires binary analysis (IDA Pro + BinDiff)

Next Steps

1. Obtain pre/post-patch ntoskrnl.exe (see docs/binary-acquisition.md)
2. BinDiff to identify the patched function
3. Complete Phase 3 (vulnerability trigger) in poc/exploit.cpp
4. Test in isolated VM environment (see docs/test-environment.md)

Build (Windows)

# From VS Developer Command Prompt
cd poc
nmake
exploit.exe --check    # System check only

Disclaimer

This project is for educational and authorized security research purposes only.