CVE-2020-14363

libX11: integer overflow leads to double free in locale handling

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se encontró una vulnerabilidad de desbordamiento de enteros conllevando a una doble liberación en libX11. Este fallo permite a un atacante privilegiado local causar que una aplicación compilada con libX11 se bloquee o, en algunos casos, resulte en una ejecución de código arbitraria. La mayor amenaza de este fallo es la confidencialidad, la integridad y la disponibilidad del sistema

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-06-17 CVE Reserved
2020-08-28 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-190: Integer Overflow or Wraparound
CWE-416: Use After Free

CAPEC

References (8)

URL	Tag	Source
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14363	Issue Tracking
https://github.com/Ruia-ruia/Exploits/blob/master/DFX11details.txt	Third Party Advisory

URL	Date	SRC
https://github.com/Ruia-ruia/Exploits/blob/master/x11doublefree.sh	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2C7LJBTLXF	2023-11-07
https://lists.x.org/archives/xorg-announce/2020-August/003056.html	2023-11-07
https://usn.ubuntu.com/4487-2	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-14363	2021-05-18
https://bugzilla.redhat.com/show_bug.cgi?id=1872473	2021-05-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
X.org Search vendor "X.org"		Libx11 Search vendor "X.org" for product "Libx11"				< 1.6.12 Search vendor "X.org" for product "Libx11" and version " < 1.6.12"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected