High severity · published Apr 28, 2022
CVE-2021-33436
NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading
7.3
CVSS
0.3%
EPSS
No
On KEV
Description
NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\SYSTEM.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NO
Nomachine · Nomachine
6.0.0 before 6.15.1; 7.0 before 7.5.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-33436
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-33436
Third Party Advisory
https://github.com/active-labs/Advisories/blob/master/2021/ACTIVE-2021-001.md
Release Notes
https://knowledgebase.nomachine.com/SU05S00223
Release Notes
https://knowledgebase.nomachine.com/SU05S00224
Vendor Advisory
https://knowledgebase.nomachine.com/TR05S10236
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