#VU29385 Integer overflow in LibVNCServer - CVE-2019-20788
Published: June 30, 2020
Vulnerability identifier: #VU29385
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-20788
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
LibVNCServer
LibVNCServer
Software vendor:
LibVNC
LibVNC
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in libvncclient/cursor.c when processing large height or width values. A remote attacker can trick the victim to connect to a malicious VNC server, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.