CVE-2018-20021

HIGH

LibVNC < commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c - DoS

Title source: llm
STIX 2.1

Description

LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code. Vulnerability allows attacker to consume excessive amount of resources like CPU and RAM

References (12)

Core 12
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
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/12/msg00028.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 7.5
EPSS 0.0255
EPSS Percentile 85.6%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-835
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