Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in linkingvision rapidvms.This issue affects rapidvms: before PR#96.
The following code is for security research and authorized testing only.
python
# PoC for CVE-2026-33847 (Conceptual)
# This script simulates a buffer overflow scenario.
import sys
def trigger_vulnerability(payload):
"""
Simulates the vulnerable buffer copy operation in RapidVMS.
The vulnerability occurs due to improper restriction of memory buffer bounds.
"""
# Fixed size buffer allocation (simulating the vulnerable code)
buffer_size = 256
buffer = ['\x00'] * buffer_size
try:
# VULNERABILITY: Copying data without checking length against buffer_size
for i in range(len(payload)):
buffer[i] = payload[i]
print(f"Successfully wrote {len(payload)} bytes to buffer.")
except IndexError:
print("Buffer overflow detected!")
if __name__ == "__main__":
# Creating a payload larger than the buffer to trigger the overflow
# In a real exploit, this payload would contain shellcode or ROP gadgets.
malicious_payload = "A" * 300
print(f"[+] Triggering CVE-2026-33847 with payload size: {len(malicious_payload)}")
trigger_vulnerability(malicious_payload)
print("[+] Exploit attempt finished.")