7.5
HIGH
CVE-2020-14399
LibVNCServer Pointer Arithmetic Vulnerability
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.

INFO

Published Date :

June 17, 2020, 4:15 p.m.

Last Modified :

Nov. 21, 2024, 5:03 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-14399 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Canonical ubuntu_linux
1 Debian debian_linux
1 Opensuse leap
1 Libvncserver_project libvncserver
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-14399.

URL Resource
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1860354 Issue Tracking Patch Third Party Advisory
https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d Patch
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 Release Notes
https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html Mailing List Third Party Advisory
https://usn.ubuntu.com/4434-1/ Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1860354 Issue Tracking Patch Third Party Advisory
https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d Patch
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 Release Notes
https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html Mailing List Third Party Advisory
https://usn.ubuntu.com/4434-1/ Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-14399 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-14399 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1860354
    Added Reference https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d
    Added Reference https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13
    Added Reference https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html
    Added Reference https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html
    Added Reference https://usn.ubuntu.com/4434-1/
  • CVE Modified by [email protected]

    Aug. 04, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    May. 17, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Apr. 11, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Mar. 21, 2024

    Action Type Old Value New Value
    Added Tag MITRE disputed
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Changed Description ** DISPUTED ** 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." 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.
  • Modified Analysis by [email protected]

    Feb. 27, 2023

    Action Type Old Value New Value
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html Mailing List, Third Party Advisory
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1860354 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1860354 Issue Tracking, Patch, Third Party Advisory
    Changed Reference Type https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d Patch, Third Party Advisory https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d Patch
    Changed Reference Type https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 Release Notes, Third Party Advisory https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 Release Notes
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html No Types Assigned https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html Mailing List, Third Party Advisory
    Changed Reference Type https://usn.ubuntu.com/4434-1/ No Types Assigned https://usn.ubuntu.com/4434-1/ Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
  • CVE Modified by [email protected]

    Aug. 29, 2020

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 30, 2020

    Action Type Old Value New Value
    Changed Description An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. ** DISPUTED ** 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."
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1860354 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 28, 2020

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/4434-1/ [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 24, 2020

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Jul. 23, 2020

    Action Type Old Value New Value
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html Mailing List, Third Party Advisory
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html Mailing List, Third Party Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html No Types Assigned https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html Mailing List, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* *cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 21, 2020

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 18, 2020

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 30, 2020

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Jun. 18, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d No Types Assigned https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d Patch, Third Party Advisory
    Changed Reference Type https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 No Types Assigned https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 Release Notes, Third Party Advisory
    Added CWE NIST NVD-CWE-Other
    Added CPE Configuration OR *cpe:2.3:a:libvncserver_project:libvncserver:*:*:*:*:*:*:*:* versions up to (excluding) 0.9.13
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-14399 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-14399 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.78 }} -0.56%

score

0.81216

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability