PT-2020-2990 · Libvnc+4 · Libvncserver+4

Published 2020-06-17 · Updated 2024-08-04 · CVE-2020-14399

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions LibVNCServer versions prior to 0.9.13

Description An issue was discovered in the libvncclient/rfbproto.c component of LibVNCServer, related to errors in the code. This issue allows a remote attacker to potentially cause a denial of service by accessing byte-aligned data through uint32 t pointers. It is reportedly noted that there is "no trust boundary crossed."

Recommendations For LibVNCServer versions prior to 0.9.13, update to version 0.9.13 or later to resolve the issue. As a temporary workaround, consider restricting access to the libvncclient/rfbproto.c component until a patch is available.

Fix

Weakness Enumeration

CWE-17

Related Identifiers

ALT-PU-2020-2671

ALT-PU-2020-2694

BDU:2020-03159

CVE-2020-14399

DLA-2264-1

DLA-2347-1

MGASA-2020-0280

OPENSUSE-SU-2020:0988-1

OPENSUSE-SU-2020:1025-1

OPENSUSE-SU-2020:1056-1

OPENSUSE-SU-2020_0988-1

OPENSUSE-SU-2020_1025-1

OPENSUSE-SU-2020_1056-1

OPENSUSE-SU-2024:10598-1

SUSE-SU-2020:14424-1

SUSE-SU-2020:1922-1

SUSE-SU-2020:2167-1

USN-4434-1

Affected Products

Alt Linux

Libvncserver

Linuxmint

Suse

Ubuntu

References · 79

• https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d · Patch
• https://security-tracker.debian.org/tracker/CVE-2020-14399 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14405 · Vendor Advisory
• https://wiki.astralinux.ru/pages/viewpage.action?pageId=47416144 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14398 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-14399 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2264-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20211019SE81 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:14424-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:2167-1 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1860354 · Patch
• https://ubuntu.com/security/CVE-2020-14402 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:1922-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14399 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-03159 · Security Note