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CVE-2022-24750

Low privilege user is able to exploit the service and gain SYSTEM privileges in UltraVNC server

Published: Mar 10, 2022Updated: Nov 21, 2024 Sources: CVE List NVDCWE-269
8.8HIGH
NVD MITRE
EPSS Score
0.3%
Top 82.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

UltraVNC is a free and open source remote pc access software. A vulnerability has been found in versions prior to 1.3.8.0 in which the DSM plugin module, which allows a local authenticated user to achieve local privilege escalation (LPE) on a vulnerable system. The vulnerability has been fixed to allow loading of plugins from the installed directory. Affected users should upgrade their UltraVNC to 1.3.8.1. Users unable to upgrade should not install and run UltraVNC server as a service. It is advisable to create a scheduled task on a low privilege account to launch WinVNC.exe instead. There are no known workarounds if winvnc needs to be started as a service.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:CC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-269NVD-CWE-noinfo

Affected Products

ultravnc
commercialaka ultra vnc
UltraVNCOn-prem
Consumer Software / productivity
uvnc
commercial
ultravncOn-prem
Consumer Software / file-utility

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/ultravnc/UltraVNC/security/advisories/GHSA-3mvp-cp5x-vj5g
github.com
https://github.com/ultravnc/UltraVNC/commit/36a31b37b98f70c1db0428f5ad83170d604fb352
github.com
https://github.com/bowtiejicode/UltraVNC-DSMPlugin-LPE
github.com
News mentions
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