The critical distinction here is that this is not a DLL hijacking vulnerability in the traditional sense. Standard DLL hijacking exploits search order or side-loading where an application accidentally loads a library from an unintended path. This CVE is different — the attacker crafts an openssl.cnf file that explicitly instructs OpenSSL to load DLLs from attacker-controlled locations. The configuration file itself is the exploit vector, not merely the delivery mechanism for a malicious DLL.
This matters because it changes what you need to defend. Check your application's OpenSSL configuration files — specifically openssl.cnf and any custom config specified via the OPENSSL_CONF environment variable or application-specific config paths. Look for ENGINE, dynamic_ptr, or certificate handler directives that specify DLL paths. These directives tell OpenSSL to resolve and load libraries from paths you may not have intended to expose.
The startup execution context elevates the practical risk beyond what CVSS 7.8 captures. If FirmaCheck runs at system boot (common for enterprise license management software), the attacker gains persistence without user interaction — code executes invisibly at privilege boot before security tools initialize. This is arbitrary code execution with systemic reach into the boot sequence, not just isolated code execution.
Verify the ACLs on C:\Program Files (x86)\Common Files\SSL\ and any directory where your application stores its openssl.cnf. If standard users can write to these locations, the attack becomes trivially exploitable. If it requires administrative context, the severity aligns with the reported CVSS score.
The broader implication: any application using OpenSSL's ENGINE architecture or config-parsing for certificate handling carries this attack surface by inheritance. You're not just defending your code — you're defending a configuration-driven plugin system that resolves arbitrary DLL paths. Audit your OpenSSL integration, restrict config file locations to admin-only paths, and consider whether your application really needs OpenSSL's dynamic engine loading capability. If it doesn't, disable it.