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7.5
CVSSv3

CVE-2018-20021

Published: 19/12/2018 Updated: 23/10/2020
CVSS v2 Base Score: 7.8 | Impact Score: 6.9 | Exploitability Score: 10
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9
VMScore: 694
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
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Vulnerability Summary

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

Vulnerability Trend

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libvnc project libvncserver

canonical ubuntu linux 14.04

debian debian linux 9.0

debian debian linux 8.0

canonical ubuntu linux 18.04

canonical ubuntu linux 18.10

canonical ubuntu linux 16.04

Vendor Advisories

Debian CVElist Bug Report Logs: libvncserver: Multiple security vulnerabilities
Debian Bug report logs - #916941 libvncserver: Multiple security vulnerabilities Package: libvncserver; Maintainer for libvncserver is Peter Spiess-Knafl <dev@spiessknaflat>; Reported by: Markus Koschany <apo@debianorg> Date: Thu, 20 Dec 2018 18:21:01 UTC Severity: grave Tags: patch, security, upstream Found in ve ...
Ubuntu Security Notice: libvncserver vulnerabilities
Several security issues were fixed in LibVNCServer ...
Red Hat: CVE-2018-20021
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

CWE-835https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-031-libvnc-infinite-loop/https://lists.debian.org/debian-lts-announce/2018/12/msg00017.htmlhttps://usn.ubuntu.com/3877-1/https://www.debian.org/security/2019/dsa-4383https://security.gentoo.org/glsa/201908-05https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlhttps://lists.debian.org/debian-lts-announce/2019/11/msg00033.htmlhttps://lists.debian.org/debian-lts-announce/2019/12/msg00028.htmlhttps://security.gentoo.org/glsa/202006-06https://usn.ubuntu.com/4547-1/https://usn.ubuntu.com/4547-2/https://usn.ubuntu.com/4587-1/https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916941https://usn.ubuntu.com/3877-1/https://nvd.nist.gov
CVSSv3
CVSSv2
CVSSv3
VMScore
Recommendations:
NULL pointer dereferenceCVE-2023-52689CVE-2024-23803client sideCVE-2023-52696information disclosureCVE-2024-35843CVE-2024-27130CVE-2023-52697
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