Heap-based buffer overflow in UltraVNC - CVE-2019-8271
Published: November 26, 2019 / Updated: November 27, 2019
Vulnerability identifier: #VU22991
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2019-8271
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ultravnc.sourceforge.net
Affected software:
UltraVNC
UltraVNC
Detailed vulnerability description
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.
How to mitigate CVE-2019-8271
Install updates from vendor's website.