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KLCERT-19-014: UltraVNC Out-of-bounds Read

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CVE-IDS CVE-2019-8267
Publication date 2019.03.01
Researcher Pavel Cheremushkin, Kaspersky Lab ICS CERT
Description UltraVNC revision 1207 has out-of-bounds read vulnerability in VNC client code inside TextChat module, which results in a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. This vulnerability has been fixed in revision 1208.
Impact Successful exploitation of this vulnerability could allow an attacker to cause denial of service.
CVSS v3 Base Score: 7.5
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability Remotely
Difficulty Low
User interaction None
Existence of exploit Unknown
Affected products
Affected products UltraVNC before
Vendor mitigation Update UltraVNC to revision 1208.
Timeline Jan 2019 – Vulnerabilities reported
Feb 2019 – Vendor releases patch
Mar 2019 – Advisory published