Out-of-Bounds Access Vulnerabilities in UltraVNC by UltraVNC
CVE-2019-8266

9.8CRITICAL

Key Information:

Vendor

Kaspersky
Status
Ultravnc
Vendor
CVE Published:
8 March 2019

What is CVE-2019-8266?

UltraVNC revision 1207 contains multiple out-of-bounds access vulnerabilities that arise from improper usage of the ClientConnection::Copybuffer function within the VNC client code. These security flaws can potentially lead to remote code execution when exploited over network connectivity. User interaction is necessary to activate these vulnerabilities. It is important to note that these issues have been addressed and resolved in revision 1208.

Affected Version(s)

UltraVNC 1.2.2.3

References

https://ics-cert.kaspersky.com/advisories/klcert-advisori...
x_refsource_MISC
https://cert-portal.siemens.com/productcert/pdf/ssa-92709...
x_refsource_CONFIRM
https://www.us-cert.gov/ics/advisories/icsa-20-161-06
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2019-8266 : Out-of-Bounds Access Vulnerabilities in UltraVNC by UltraVNC