Memory leak in UltraVNC - CVE-2019-8259
Published: November 25, 2019 / Updated: November 27, 2019
Vulnerability identifier: #VU22961
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-8259
CWE-ID: CWE-401
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 gain access to sensitive information on the target system.
The vulnerability exists due memory leak in VNC client code. A remote attacker that controls a malicious VNC server can trick a user to connect to it and access sensitive information.
Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR.
How to mitigate CVE-2019-8259
Install updates from vendor's website.