PT-2020-3583 · X.Org Foundation+8 · Libx11+8

Todd Carson · Published 2020-07-31 · Updated 2026-05-07 · CVE-2020-14344

Positive Technologies (AI Summary)

CVSS v3.1

6.7

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions libX11 versions prior to 1.6.10

Description The issue is caused by an integer overflow in the libX11 library, which can lead to a heap-buffer overflow. This can potentially impact the confidentiality, integrity, and availability of protected information. The vulnerability is security-relevant when setuid programs call XIM client functions while running with elevated privileges.

Recommendations For versions prior to 1.6.10, update to version 1.6.10 or later to resolve the issue. As a temporary workaround, consider restricting the use of setuid programs that call XIM client functions to minimize the risk of exploitation.

Exploit

Fix

Integer Overflow

Buffer Overflow

Weakness Enumeration

CWE-190

CWE-119

Related Identifiers

ALSA-2021:1804

ALT-PU-2020-2588

ALT-PU-2021-1868

ALT-PU-2021-2344

BDU:2020-03916

CESA-2021_1804

CVE-2020-14344

DLA-2312-1

JLSEC-2026-469

MGASA-2020-0334

OPENSUSE-SU-2020:1162-1

OPENSUSE-SU-2020:1164-1

OPENSUSE-SU-2020:1182-1

OPENSUSE-SU-2020:1198-1

OPENSUSE-SU-2020_1162-1

OPENSUSE-SU-2020_1164-1

OPENSUSE-SU-2020_1182-1

OPENSUSE-SU-2020_1198-1

OPENSUSE-SU-2024:10918-1

RHSA-2021:1804

RHSA-2021_1804

RLSA-2021:1804

SUSE-SU-2020:14445-1

SUSE-SU-2020:14447-1

SUSE-SU-2020:2116-1

SUSE-SU-2020:2117-1

SUSE-SU-2020:2196-1

SUSE-SU-2020:2197-1

SUSE-SU-2020_14445-1

SUSE-SU-2020_14447-1

SUSE-SU-2020_2116-1

SUSE-SU-2020_2117-1

SUSE-SU-2020_2196-1

SUSE-SU-2020_2197-1

USN-4487-1

USN-4487-2

Affected Products

Alt Linux

Almalinux

Centos

Linuxmint

Red Hat

Rocky Linux

Suse

Ubuntu

Libx11

References · 113

• 🔥 https://github.com/Ruia-ruia/Exploits/blob/master/x11doublefree.sh · Exploit
• https://linux.oracle.com/errata/ELSA-2021-1804.html · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4487-2 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2C7LJBTLXF · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-14344 · Security Note
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00015.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14344 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-14344 · Vendor Advisory
• https://openwall.com/lists/oss-security/2020/07/31/1 · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2020:1198-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-14344 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00014.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-14344 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:14447-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2020-14344 · Vendor Advisory