CVE-2019-8263

Description

UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.

Categories

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.14% Top 25%
Third-Party Advisory siemens.com Third-Party Advisory kaspersky.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-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/ third party advisory not applicable
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/ 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
https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11

Frequently Asked Questions

What is the severity of CVE-2019-8263?
CVE-2019-8263 has been scored as a medium severity vulnerability.
How to fix CVE-2019-8263?
To fix CVE-2019-8263, 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-2019-8263 being actively exploited in the wild?
It is possible that CVE-2019-8263 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-2019-8263?
CVE-2019-8263 affects Kaspersky Lab UltraVNC.
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