Privilege escalation in X.Org libX11



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-14363
CWE-ID CWE-415
Exploitation vector Local
Public exploit N/A
Vulnerable software
 libx11
Other software / Other software solutions

Vendor xorg.freedesktop.org

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Double Free

EUVDB-ID: #VU46027

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14363

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when handling locales in LibX11. A local user can run a specially crafted program to trigger integer overflow and double free and execute arbitrary code on the system with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

libx11: 1.6.0 - 1.6.11

CPE2.3 External links

http://seclists.org/oss-sec/2020/q3/135


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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