PT-2022-5190 · Realvnc · Realvnc Vnc Server

Published 2022-06-10 · Updated 2022-10-19 · CVE-2022-27502

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions RealVNC VNC Server versions 5.1.0 through 6.9.0 for Windows

Description The issue is related to the execution of files in the %TEMP% directory as SYSTEM, allowing an attacker to escalate privileges. This occurs because an installer repair operation executes %TEMP% files as SYSTEM.

Recommendations For RealVNC VNC Server versions 5.1.0 through 6.9.0, consider restricting access to the %TEMP% directory to minimize the risk of exploitation until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

BDU:2022-06447

CVE-2022-27502

Affected Products

Realvnc Vnc Server

References · 10

• 🔥 https://github.com/alirezac0/CVE-2022-27502 · Exploit
• https://osv.dev/vulnerability/CVE-2022-27502 · Vendor Advisory
• https://help.realvnc.com/hc/en-us/articles/360002478311-Are-there-any-known-security-vulnerabilities-#cve-2008-4770-moderate-%E2%80%94-only-affects-vnc-viewer--0-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-06447 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-27502 · Security Note
• https://realvnc.com · Vendor Advisory
• https://t.me/proxy_bar/1079 · Telegram Post
• https://t.me/cibsecurity/44178 · Telegram Post
• https://t.me/cybersecuritytechnologies/7007 · Telegram Post
• https://t.me/cvenotify/31792 · Telegram Post