PT-2023-5726 · Tightvnc · Tightvnc

Published 2023-04-12 · Updated 2025-02-08 · CVE-2023-27830

Positive Technologies (AI Summary)

CVSS v3.1

9.0

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions TightVNC versions prior to 2.8.75

Description The issue is related to errors in privilege management, allowing remote attackers to escalate their privileges on the host operating system. This can be achieved by replacing legitimate files with crafted files during a file transfer, taking advantage of the fact that TightVNC runs with high privileges in the backend.

Recommendations For versions prior to 2.8.75, update to version 2.8.75 or later to resolve the issue. As a temporary workaround, consider restricting file transfer operations until the update is applied.

Exploit

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

BDU:2023-06396

CVE-2023-27830

Affected Products

Tightvnc

References · 7

• 🔥 https://medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-8165208cce · Exploit
• https://bdu.fstec.ru/vul/2023-06396 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-27830 · Security Note
• https://osv.dev/vulnerability/CVE-2023-27830 · Vendor Advisory
• https://tightvnc.com/whatsnew.php · Note
• https://tightvnc.com/news.php · Note
• https://t.me/cvenotify/110493 · Telegram Post