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KLCERT-19-009: UltraVNC Access of Memory Location After End of Buffer

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CVE-IDS CVE-2019-8280
Publication date 2019.03.01
Researcher Pavel Cheremushkin, Kaspersky Lab ICS CERT
Description UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside RAW decoder, which can potentially result code execution. This attack appear to be exploitable via network connectivity. This vulnerability has been fixed in revision 1204.
Impact Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code.
CVSS v3 Base Score: 10.0
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/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 1204
Timeline Jan 2019 – Vulnerabilities reported
Feb 2019 – Vendor releases patch
Mar 2019 – Advisory published