PT-2020-10803 · Libvnc+4 · Libvncserver+4

Derdakon · Published 2020-06-17 · Updated 2022-03-10 · CVE-2019-20840

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 in libvncserver/ws decode.c can lead to a crash due to unaligned accesses in the hybiReadAndDecode function.

Recommendations For versions prior to 0.9.13, update to version 0.9.13 or later to resolve the issue.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2020-2671

ALT-PU-2020-2694

CVE-2019-20840

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-2020:1922-1

SUSE-SU-2020:2167-1

USN-4434-1

Affected Products

Alt Linux

Libvncserver

Linuxmint

Suse

Ubuntu

References · 62

• https://github.com/LibVNC/libvncserver/commit/0cf1400c61850065de590d403f6d49e32882fd76 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-20840 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4F6FUH4EFK4NAP6GT4TQRTBKWIRCZLIY · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14405 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14398 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-20840 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-20840 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2020:2167-1 · Vendor Advisory
• 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://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf · Patch
• https://security-tracker.debian.org/tracker/CVE-2019-20840 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14397 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14404 · Vendor Advisory