#VU46031 Integer underflow in X.org Server

Published: 2020-08-25

Vulnerability identifier: #VU46031

Vulnerability 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-2020-14362


Exploitation vector: Local

Exploit availability: No

Vulnerable software:
X.org Server
Server applications / Other server solutions

Vendor: X.org


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

The vulnerability exists due to integer underflow in the XRecordRegisterClients(). A local user can send a specially crafted request to the affected application, trigger integer underflow and execute arbitrary code on the target system with elevated privileges.

Install updates from vendor's website.

Vulnerable software versions

X.org Server: 1.20.0 - 1.20.8

External links

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.

Latest bulletins with this vulnerability