Integer underflow in UltraVNC - CVE-2018-15361
Published: November 25, 2019 / Updated: November 27, 2019
Vulnerability identifier: #VU22959
CSH Severity: Medium
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-15361
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer underflow in VNC client code. A remote attacker that controls a malicious VNC server can trick a user to connect to it, trigger integer underflow and execute arbitrary code on the target system with privileges of the user, running the VNC client.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
UltraVNC
How to mitigate CVE-2018-15361
Install updates from vendor's website.
UltraVNC - update to 1.2.2.3