Bug 1872473 (CVE-2020-14363) - CVE-2020-14363 libX11: integer overflow leads to double free in locale handling
Summary: CVE-2020-14363 libX11: integer overflow leads to double free in locale handling
Status: NEW
Alias: CVE-2020-14363
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
: 1872572 (view as bug list)
Depends On: 1872474 1873920 1873921 1873922 1873923
Blocks: 1862265
TreeView+ depends on / blocked
Reported: 2020-08-25 20:54 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-10-20 05:13 UTC (History)
11 users (show)

Fixed In Version: libX11 1.6.12
Doc Type: If docs needed, set a value
Doc Text:
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.
Clone Of:
Last Closed:

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Description Guilherme de Almeida Suckevicz 2020-08-25 20:54:47 UTC
There is an integer overflow and a double free vulnerability in the way LibX11 handles locales. The integer overflow is a necessary precursor to the double free.

Comment 1 Guilherme de Almeida Suckevicz 2020-08-25 20:55:06 UTC
Created libX11 tracking bugs for this issue:

Affects: fedora-all [bug 1872474]

Comment 3 Doran Moppert 2020-08-27 00:46:11 UTC
*** Bug 1872572 has been marked as a duplicate of this bug. ***

Comment 4 Huzaifa S. Sidhpurwala 2020-08-31 03:27:22 UTC
External References:


Comment 7 RaTasha Tillery-Smith 2020-09-01 14:32:47 UTC

Xorg server does not run with root privileges in Red Hat Enterprise Linux 8. Therefore this flaw has been rated as having a moderate impact for Red Hat Enterprise Linux 8.

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