CVE-2019-8268

Description

UltraVNC revision 1206 has multiple off-by-one vulnerabilities in VNC client code connected with improper usage of ClientConnection::ReadString function, which can potentially result code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1207.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.49% Top 20%
Third-Party Advisory siemens.com Third-Party Advisory kaspersky.com Third-Party Advisory us-cert.gov
Affected: Kaspersky Lab UltraVNC
Published at:
Updated at:

References

Link Tags
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-015-ultravnc-off-by-one-error/ third party advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf third party advisory
https://www.us-cert.gov/ics/advisories/icsa-20-161-06 third party advisory us government resource

Frequently Asked Questions

What is the severity of CVE-2019-8268?
CVE-2019-8268 has been scored as a critical severity vulnerability.
How to fix CVE-2019-8268?
To fix CVE-2019-8268, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-8268 being actively exploited in the wild?
It is possible that CVE-2019-8268 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-8268?
CVE-2019-8268 affects Kaspersky Lab UltraVNC.
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