Out-of-bounds Read in Kaspersky Lab Ultravnc
CVE-2019-8266
UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of ClientConnection::Copybuffer function in VNC client code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. User interaction is required to trigger these vulnerabilities. These vulnerabilities have been fixed in revision 1208.
EPSS: 0.028 (85.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Kaspersky Lab Ultravnc — versions 1.2.2.3
- Uvnc Ultravnc
Weakness classification (CWE)
References
- vulnerability@kaspersky.com (Third Party Advisory, x_refsource_MISC)
- vulnerability@kaspersky.com (x_refsource_CONFIRM)
- vulnerability@kaspersky.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2019-8266?
- CVE-2019-8266 is a critical-severity vulnerability in Kaspersky Lab Ultravnc, classified under CWE-788. CVSS score: 9.8/10. Published 2019-03-08.
- How severe is CVE-2019-8266?
- Critical severity. CVSS v3 base score is 9.8 out of 10.