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CVE-2020-14363

Published: 25 August 2020

An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
libx11
Launchpad, Ubuntu, Debian
bionic
Released (2:1.6.4-3ubuntu0.3)
focal
Released (2:1.6.9-2ubuntu1.1)
upstream Needs triage

xenial
Released (2:1.6.3-1ubuntu2.2)
trusty
Released (2:1.6.2-1ubuntu2.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
Patches:
upstream: https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/acdaaadcb3d85c61fd43669fc5dddf0f8c3f911d

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H