PT-2020-6271 · Unknown+8 · Libvncserver+8

Ramin Farajpour Cami · Published 2020-06-17 · Updated 2022-03-10 · CVE-2019-20839

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

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

Description The issue is related to a buffer overflow in the libvncclient/sockets.c component of LibVNCServer. This buffer overflow can occur via a long socket filename. Exploitation of this issue may allow a remote attacker to cause a denial of service.

Recommendations For 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/sockets.c component to minimize the risk of exploitation.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

ALSA-2021:1811

ALT-PU-2020-2671

ALT-PU-2020-2694

BDU:2021-03751

CESA-2021_1811

CVE-2019-20839

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

RHSA-2021:1811

RHSA-2021_1811

RLSA-2021:1811

SUSE-SU-2020:1922-1

SUSE-SU-2020:2167-1

USN-4434-1

Affected Products

Alt Linux

Almalinux

Centos

Libvncserver

Linuxmint

Red Hat

Rocky Linux

Suse

Ubuntu

References · 94

• https://github.com/LibVNC/libvncserver/commit/3fd03977c9b35800d73a865f167338cb4d05b0c1 · Patch
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4F6FUH4EFK4NAP6GT4TQRTBKWIRCZLIY · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2021-1811.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14405 · Vendor Advisory
• https://wiki.astralinux.ru/pages/viewpage.action?pageId=47416144 · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2021:1811 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14398 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2021:1811 · 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-2020:2167-1 · 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