Detections
Analytics

CVE-2018-20020

critical

Description

LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution

References

https://www.debian.org/security/2019/dsa-4383

https://usn.ubuntu.com/4587-1/

https://usn.ubuntu.com/4547-2/

https://usn.ubuntu.com/4547-1/

https://usn.ubuntu.com/3877-1/

https://security.gentoo.org/glsa/202006-06

https://security.gentoo.org/glsa/201908-05

https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html

https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/

https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html

https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html

https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-12598

Details

Source: Mitre, NVD

Published: 2018-12-19

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.08659