Privilege Escalation — Nssm-2.24

import os import sys

# Create malicious configuration file with open(malicious_config_file, 'w') as f: f.write(' malicious content ') nssm-2.24 privilege escalation

The NSSM-2.24 privilege escalation vulnerability allows an attacker to gain elevated privileges on a system. Users are recommended to update NSSM to version 2.25 or later and restrict access to the NSSM configuration directory to prevent exploitation. import os import sys # Create malicious configuration

# Start the service nssm_command = 'nssm start service_name' os.system(nssm_command) NSSM is often used as an alternative to

# Set the configuration file path in the NSSM service configuration nssm_command = f'nssm set service_name config {malicious_config_file}' os.system(nssm_command)

NSSSM (Non-Sucking Service Manager) is a service manager for Windows that allows users to easily install, configure, and manage system services. NSSM is often used as an alternative to the built-in Windows Service Manager. A vulnerability was discovered in NSSM version 2.24 that allows for privilege escalation.

The vulnerability exists due to improper handling of service configuration files. NSSM uses a configuration file to store service settings, and these files are stored in a directory that is writable by the SYSTEM user. When a user with limited privileges attempts to start a service using NSSM, the service manager will attempt to read and write to the configuration file.