Heap-based buffer overflow in UltraVNC - CVE-2019-8271
Published: November 26, 2019 / Updated: November 27, 2019
Vulnerability identifier: #VU22991
CSH Severity: Medium
CVSS v4: 7.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-8271
CWE-ID: CWE-122
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 a boundary error in VNC server code inside file transfer handler. A remote authenticated attacker can trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
UltraVNC
How to mitigate CVE-2019-8271
Install updates from vendor's website.
UltraVNC - update to 1.2.2.3