Fortinet Discovers CactusVPN DLL PreLoading Vulnerability
Fortinet's FortiGuard Labs has discovered a DLL preloading vulnerability in CactusVPN for Windows.
CactusVPN for Windows is a Virtual Private Network product to protect a user's identity and personal privacy using their anonymous VPN and proxy services. It allows users to anonymize all their online activities.
CactusVPN for WIndows is susceptible to a DLL preloading vulnerability. The issue occurs when the application looks to load a DLL for execution and an attacker provides a malicious DLL to use instead. The application generally follows a specific search path to locate the DLL. The vulnerability can be exploited by a simple file write (or potentially an over-write) which results in a foreign DLL running under the context of the application.
Users should apply the solution provided by CactusVPN.
Fortinet reported the vulnerability to CactusVPN on May 21, 2018.
CactusVPN confirmed the vulnerability on June 05, 2018.
CactusVPN released patch for it on June 25, 2018.