UltraVNC Launcher 1.2.2.4 contains a buffer overflow vulnerability in the Path vncviewer.exe property field that allows local attackers to crash the application by supplying an excessively long string. Attackers can input a 300-byte payload of repeated characters through the Properties dialog to trigger a denial of service condition.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://www.exploit-db.com/exploits/46703
disclosure@vulncheck.com
https://www.uvnc.com/
disclosure@vulncheck.com
https://www.uvnc.com/downloads/ultravnc/126-download-ultravnc-1224.html
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/ultravnc-launcher-denial-of-service-buffer…
disclosure@vulncheck.com