VulnerabilityModified
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.
HIGH 7.3EPSS 0.28%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.3 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.28% probability · 20th percentile
- CISA KEV
- Not listed
- Affected
- nomachine/nomachine
- Source
- cve@mitre.org
References
- https://github.com/active-labs/Advisories/blob/master/2021/ACTIVE-2021-001.mdThird Party Advisory
- https://knowledgebase.nomachine.com/SU05S00223Release Notes, Vendor Advisory
- https://knowledgebase.nomachine.com/SU05S00224Release Notes, Vendor Advisory
- https://knowledgebase.nomachine.com/TR05S10236Vendor Advisory
- https://github.com/active-labs/Advisories/blob/master/2021/ACTIVE-2021-001.mdThird Party Advisory
- https://knowledgebase.nomachine.com/SU05S00223Release Notes, Vendor Advisory
- https://knowledgebase.nomachine.com/SU05S00224Release Notes, Vendor Advisory
- https://knowledgebase.nomachine.com/TR05S10236Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.