CVE-2020-14399

Name: CVE-2020-14399
Creator: NVD / NIST
Published: 2020-06-17T16:15:11.93+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.80%

Last modified Jun 17, 2026

CVE-2020-14399 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. EPSS estimates a 2.80% chance of exploitation in the next 30 days.

Description

An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.80%

84.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Libvncserver Project	Libvncserver	< 0.9.13
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Opensuse	Leap	15.1
Opensuse	Leap	15.2
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	20.04

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1860354Issue Tracking, Patch, Third Party Advisory
https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2dPatch
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13Release Notes
https://lists.debian.org/debian-lts-announce/2020/06/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00045.htmlMailing List, Third Party Advisory
https://usn.ubuntu.com/4434-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1860354Issue Tracking, Patch, Third Party Advisory
https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2dPatch
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13Release Notes
https://lists.debian.org/debian-lts-announce/2020/06/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00045.htmlMailing List, Third Party Advisory
https://usn.ubuntu.com/4434-1/Third Party Advisory

Timeline

Published: Jun 17, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-14399?

An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.

How severe is CVE-2020-14399?

CVE-2020-14399 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.80% probability of exploitation in the next 30 days.

How do I fix CVE-2020-14399?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-14399?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST