CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
48.8%
# Exploit Title: TotalAV 2020 4.14.31 - Privilege Escalation
# Date: 2020-01-09
# Exploit Author: Kusol Watchara-Apanukorn
# Vendor Homepage: https://www.totalav.com/
# Version: 4.14.31
# Fixed on: 5.3.35
# Tested on: Windows 10 x64
# CVE : CVE-2019-18194
# Vulnerability Description:
# TotalAV 2020 4.14.31 has quarantine flaw that allows attacker escape of
# privilege by using NTFS directory junction.
**You can download vulnerability version with this link:
https://install.protected.net/windows/cdn3/4.14.31/TotalAV_Setup.exe
///////////////////////////////////
Proof of Concept
//////////////////////////////////
1. Plant the malicious file in this case we use DLL file
2. To exploit the vulnerability antivirus must detect the malicious dll
3. Move it to quarantine.
4. Attacker must create NTFS directory junction to restore
Full step: https://www.youtube.com/watch?v=88qeaLq98Gc
Vulnerability Disclosure Timeline:
==================================
17 Oct, 19 : Found Vulnerability
18 Oct, 19 : Vendor Notification
18 Oct, 19 : Request CVE
21 Oct, 19 : Vendor Response
mid Dec, 19 : Vendor released new patched (v5.3.35)
09 Jan, 20: Vulnerability Disclosure
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
48.8%