Vulnerabilities > CVE-2018-6947 - Improper Initialization vulnerability in multiple products

047910
CVSS 7.2 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
local
low complexity
nomachine
microsoft
CWE-665
exploit available

Summary

An uninitialised stack variable in the nxfuse component that is part of the Open Source DokanFS library shipped with NoMachine 6.0.66_2 and earlier allows a local low privileged user to gain elevation of privileges on Windows 7 (32 and 64bit), and denial of service for Windows 8 and 10.

Vulnerable Configurations

Part Description Count
Application
Nomachine
54
OS
Microsoft
3

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leveraging Race Conditions
    This attack targets a race condition occurring when multiple processes access and manipulate the same resource concurrently and the outcome of the execution depends on the particular order in which the access takes place. The attacker can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance a race condition can occur while accessing a file, the attacker can trick the system by replacing the original file with his version and cause the system to read the malicious file.
  • Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
    This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. The typical example is the file access. The attacker can leverage a file access race condition by "running the race", meaning that he would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the attacker could do something such as replace the file and cause an escalation of privilege.

Exploit-Db

  • descriptionNoMachine x64 < 6.0.80 - 'nxfuse' Privilege Escalation. CVE-2018-6947. Local exploit for Windows_x86-64 platform. Tags: Local
    fileexploits/windows_x86-64/local/44168.py
    idEDB-ID:44168
    last seen2018-02-22
    modified2018-02-22
    platformwindows_x86-64
    port
    published2018-02-22
    reporterExploit-DB
    sourcehttps://www.exploit-db.com/download/44168/
    titleNoMachine x64 < 6.0.80 - 'nxfuse' Privilege Escalation
    typelocal
  • descriptionNoMachine x86 < 6.0.80 - 'nxfuse' Privilege Escalation. CVE-2018-6947. Local exploit for Windows_x86 platform. Tags: Local
    fileexploits/windows_x86/local/44167.c
    idEDB-ID:44167
    last seen2018-02-22
    modified2018-02-22
    platformwindows_x86
    port
    published2018-02-22
    reporterExploit-DB
    sourcehttps://www.exploit-db.com/download/44167/
    titleNoMachine x86 < 6.0.80 - 'nxfuse' Privilege Escalation
    typelocal

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/146544/nomachine-escalate.txt
idPACKETSTORM:146544
last seen2018-02-24
published2018-02-23
reporterFidus InfoSecurity
sourcehttps://packetstormsecurity.com/files/146544/NoMachine-nxfuse-Privilege-Escalation.html
titleNoMachine nxfuse Privilege Escalation