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SUPREMO 4.1.3.2348 Privilege Escalation Vulnerability
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[Security Risk High
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Details ======= Subject: Local Privilege Escalation Product: SUPREMO by Nanosystems S.r.l. Vendor Homepage: https://www.supremocontrol.com/ Vendor Status: fixed version released Vulnerable Version: 4.1.3.2348 (No other version was tested, but it is believed for the older versions to be also vulnerable.) Fixed Version: 4.2.0.2423 CVE Number: CVE-2020-25106 CVE URL: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25106 Authors: Victor Gil (A2SECURE) Adan Alvarez (A2SECURE) Vulnerability Description ======= Allows attackers to obtain LocalSystem access because when running as a service File Manager allows modifying files with system privileges. This can be used by an adversary to, for example, rename Supremo.exe and then upload a trojan horse with the Supremo.exe filename. Proof of Concept ================ To exploit this vulnerability Supremo should be running as a service. Then follow the following steps: - Connect to Supremo from a different machine. - Open File manager. - Go to the directory where the Supremo executable is located. - Modify the name of the executable. - Upload a malicious executable and rename it to Supremo.exe - Close supremo. After these steps, as supremo is running as a service, the service executes, as System, the executable allowing an attacker to elevate privileges to System. Fix === The vendor provides an updated version (4.2.0.2423) Timeline ======== 2020-07-13 Disclosed to Vendor 2020-10-19 Vendor releases the final patch 2020-12-21 Advisory released # 0day.today [2024-11-15] #