Privilege escalation in Tightvnc
CVE-2023-27830
TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (63.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.tightvnc.com/whatsnew.php (Product, Release Notes)
- medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-8165… (Exploit, Third Party Advisory)
- www.tightvnc.com/news.php (Product, Release Notes)
Frequently asked questions
- What is CVE-2023-27830?
- CVE-2023-27830 is a critical-severity vulnerability in Tightvnc, classified under Improper Privilege Management. CVSS score: 9.0/10. Published 2023-04-12.
- How severe is CVE-2023-27830?
- Critical severity. CVSS v3 base score is 9.0 out of 10.