Off-by-One Vulnerabilities in UltraVNC Client by UltraVNC
CVE-2019-8268

9.8CRITICAL

Key Information:

Vendor
Kaspersky
Status
Ultravnc
Vendor
CVE Published:
8 March 2019

Summary

UltraVNC revision 1206 contains multiple off-by-one vulnerabilities in the VNC client code, particularly related to improper use of the ClientConnection::ReadString function. These vulnerabilities could allow for potential code execution, with the exploitation requiring network connectivity. Users are advised to upgrade to revision 1207, where these vulnerabilities have been addressed.

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

.