Stack-based buffer overflow in UltraVNC - CVE-2019-8276
Published: November 26, 2019 / Updated: November 27, 2019
Vulnerability identifier: #VU22996
CSH Severity: Medium
CVSS v4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-8276
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) on the target system.
The vulnerability exists due to a boundary error in VNC server code inside file transfer request handler. A remote authenticated attacker can trigger stack-based buffer overflow and cause a denial of service condition on the target system.
Affected software
UltraVNC
How to mitigate CVE-2019-8276
Install updates from vendor's website.
UltraVNC - update to 1.2.2.3