Vulnerability Name:

CCN-116553

Published:2016-08-19
Updated:2016-08-19
Summary:Microsoft Windows could allow a local attacker to gain elevated privileges on the system, caused by improper interaction between HKEY_CLASSES_ROOT (HKCR) and HKEY_CURRENT_USER (HKCU) registry hives. By modifying values to create HKCU:\Software\Classes, an attacker could exploit this vulnerability to bypass UAC protection with Fileless to gain privileges.
CVSS v3 Severity:8.4 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.9 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:7.2 High (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Consequences:Gain Privileges
References:Source: CCN
Type: enigma0x3 Web site
“FILELESS” UAC BYPASS USING EVENTVWR.EXE AND REGISTRY HIJACKING

Source: XF
Type: UNKNOWN
ms-windows-filelessuac-priv-esc(116553)

Source: CCN
Type: Packet Storm Security [12-02-2016]
Windows Escalate UAC Protection Bypass

Source: EXPLOIT-DB
Type: EXPLOIT
Offensive Security Exploit Database [08-19-2016]

Source: CCN
Type: Microsoft Web site
Windows - Microsoft

Vulnerable Configuration:Configuration CCN 1:
  • cpe:/o:microsoft:windows:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    microsoft windows *