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CVE-2022-24750— Low privilege user is able to exploit the service and gain SYSTEM privileges in UltraVNC server

Quick assessment

Affected
ultravnc UltraVNC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

UltraVNC是一款用于Windows平台的开源远程终端控制软件。 UltraVNC 1.3.8.0 之前的版本的 DSM 插件存在安全漏洞。允许本地经过身份验证的用户在易受攻击的系统上实现本地权限提升 (LPE)。

CVSS 8.8 · High EPSS 0.27% · P19

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2022-24750

Vulnerability Information
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Vulnerability Title
Low privilege user is able to exploit the service and gain SYSTEM privileges in UltraVNC server
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
UltraVNC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UltraVNC是一款用于Windows平台的开源远程终端控制软件。 UltraVNC 1.3.8.0 之前的版本的 DSM 插件存在安全漏洞。允许本地经过身份验证的用户在易受攻击的系统上实现本地权限提升 (LPE)。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ultravnc UltraVNC < 1.3.8.0 -

II. Public POCs for CVE-2022-24750

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III. Intelligence Information for CVE-2022-24750

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Vendor Advisories for CVE-2022-24750 (1)

Other References for CVE-2022-24750 (1)

IV. Related Vulnerabilities

Same product: UltraVNC
Same vendor: ultravnc
Same weakness: CWE-269