Advisory |
Vulnerability Intelligence |
CVE |
CVE-2020-26050/Local Privilege Escalation |
Application/Platform |
SaferVPN/Windows |
The vulnerability discovered in SaferVPN Windows app, tracked as CVE-2020-26050, allows local privilege escalation on the Windows system. This is due to the execution of an associated binary in the context of NT AUTHORITY\SYSTEM, which is the highest privilege on Windows systems.
The SaferVPN application spawns openvpn.exe binary while connecting to a VPN server. The binary, then, runs in the context of NT AUTHORITY\SYSTEM and loads an openssl configuration file (openssl.cnf) from a non-existing folder in the C:\ directory. This can be abused by threat actors, whereby they replace the configuration file with a malicious one. Since the configuration file is run by NT AUTHORITY\SYSTEM, the attacker will get full control over the target system.