Division by zero in LibVNCServer - CVE-2020-25708
Published: November 27, 2020 / Updated: November 29, 2020
Vulnerability identifier: #VU48699
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-25708
CWE-ID: CWE-369
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 perform a denial of service (DoS) attack.
The vulnerability exists due to divide by zero error when processed by the VNC server, would lead to a floating point exception, resulting in a denial of service. A remote attacker can pass specially crafted file to the application and crash it.
Remediation
Install update from vendor's website.