CVE-2018-20020

CRITICAL

LibVNC <7b1ef0ffc4815cab9a96c7278394152bdc89dc4d - RCE

Title source: llm
STIX 2.1

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 (11)

Core 11
Core References
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201908-05
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202006-06
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2019/dsa-4383
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3877-1/
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4547-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4547-2/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4587-1/

Scores

CVSS v3 9.8
EPSS 0.2103
EPSS Percentile 95.7%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (7)
canonical/ubuntu_linux 14.04
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 18.04
canonical/ubuntu_linux 18.10
debian/debian_linux 8.0
debian/debian_linux 9.0
libvnc_project/libvncserver < 0.9.12
Published Dec 19, 2018
Tracked Since Feb 18, 2026