What is the severity of ZDI-CAN-11574?

ZDI-CAN-11574 has been classified as a high-severity vulnerability due to its potential for privilege escalation.

How do I fix ZDI-CAN-11574?

To resolve ZDI-CAN-11574, update the X.Org Server to the latest version provided by the vendor as it contains the necessary patches.

Who is affected by ZDI-CAN-11574?

ZDI-CAN-11574 affects any installation of the X.Org Server that is running a vulnerable version.

What type of attacks does ZDI-CAN-11574 facilitate?

ZDI-CAN-11574 allows local attackers to escalate privileges once they have the ability to execute low-privileged code.

What is the nature of the flaw in ZDI-CAN-11574?

The vulnerability in ZDI-CAN-11574 exists within the handling of certain operations in the X.Org Server that can be exploited for privilege escalation.

Vulnerability/
ZDI-CAN-11574

high

7.8

29/1/2025

ZDI-CAN-11574: X.Org Server XRecordRegisterClients Integer Underflow Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of X.Org Server. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of XRecordRegisterClients requests. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of root.

Affected Software	Affected Version	How to fix
X.Org Xserver

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Frequently Asked Questions

What is the severity of ZDI-CAN-11574?
ZDI-CAN-11574 has been classified as a high-severity vulnerability due to its potential for privilege escalation.
How do I fix ZDI-CAN-11574?
To resolve ZDI-CAN-11574, update the X.Org Server to the latest version provided by the vendor as it contains the necessary patches.
Who is affected by ZDI-CAN-11574?
ZDI-CAN-11574 affects any installation of the X.Org Server that is running a vulnerable version.
What type of attacks does ZDI-CAN-11574 facilitate?
ZDI-CAN-11574 allows local attackers to escalate privileges once they have the ability to execute low-privileged code.
What is the nature of the flaw in ZDI-CAN-11574?
The vulnerability in ZDI-CAN-11574 exists within the handling of certain operations in the X.Org Server that can be exploited for privilege escalation.

agent/references
agent/softwarecombine
agent/title
agent/severity
agent/description
agent/source
agent/type
agent/tags
collector/zdi-advisory
source/ZDI
alias/ZDI-20-1419
alias/ZDI-CAN-11574
alias/CVE-2020-14362
agent/software-canonical-lookup
agent/software-canonical-lookup-request
agent/event
vendor/x.org
canonical/x.org xserver

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Frequently Asked Questions

What is the severity of ZDI-CAN-11574?
ZDI-CAN-11574 has been classified as a high-severity vulnerability due to its potential for privilege escalation.
How do I fix ZDI-CAN-11574?
To resolve ZDI-CAN-11574, update the X.Org Server to the latest version provided by the vendor as it contains the necessary patches.
Who is affected by ZDI-CAN-11574?
ZDI-CAN-11574 affects any installation of the X.Org Server that is running a vulnerable version.
What type of attacks does ZDI-CAN-11574 facilitate?
ZDI-CAN-11574 allows local attackers to escalate privileges once they have the ability to execute low-privileged code.
What is the nature of the flaw in ZDI-CAN-11574?
The vulnerability in ZDI-CAN-11574 exists within the handling of certain operations in the X.Org Server that can be exploited for privilege escalation.