CVE-2023-5367 : Vulnerability Insights and Analysis

This CVE-2023-5367 concerns an out-of-bounds write vulnerability in the

xorg-x11-server

. The vulnerability was assigned a CVSS base score of 7.8, indicating a high severity level. It was published on October 25, 2023, by Red Hat.

Understanding CVE-2023-5367

This section will provide an overview of the CVE-2023-5367 vulnerability.

What is CVE-2023-5367?

CVE-2023-5367 is an out-of-bounds write vulnerability identified in the

xorg-x11-server

. The flaw is attributed to incorrect calculations of buffer offsets when copying data, which can lead to privilege escalation or denial of service.

The Impact of CVE-2023-5367

The impact of this vulnerability is significant, with the potential for attackers to exploit the flaw for privilege escalation or to disrupt services, posing a threat to system integrity and confidentiality.

Technical Details of CVE-2023-5367

In this section, we will delve deeper into the technical aspects of CVE-2023-5367.

Vulnerability Description

The vulnerability stems from an incorrect calculation of buffer offsets in the XiChangeDeviceProperty function in Xi/xiproperty.c and in RRChangeOutputProperty function in randr/rrproperty.c within the

xorg-x11-server

.

Affected Systems and Versions

xorg-server:
Version 21.1.9 (unaffected)
xwayland:
Version 23.2.2 (unaffected)
Red Hat Enterprise Linux:
Affected versions include

xorg-x11-server

and

tigervnc

packages for several versions such as 7, 8, and 9.

Exploitation Mechanism

The vulnerability arises from incorrect buffer offset calculations, leading to an out-of-bounds write scenario that could be exploited by attackers to escalate privileges or disrupt system services.

Mitigation and Prevention

Taking immediate steps to address vulnerabilities is crucial to maintaining system security.

Immediate Steps to Take

Regularly monitor security advisories and patches released by vendors.
Apply recommended security updates promptly to mitigate the vulnerability.

Long-Term Security Practices

Implement secure coding practices to prevent buffer overflow vulnerabilities.
Conduct regular security assessments and audits to identify and address potential weaknesses in the system.

Patching and Updates

Ensure all affected systems are updated with the latest patches provided by the vendor.
Follow best practices for patch management to minimize the risk of exploitation.

In conclusion, CVE-2023-5367 highlights the importance of proactive security measures to mitigate risks associated with out-of-bounds write vulnerabilities. Stay informed about security advisories and apply updates promptly to safeguard system integrity and data confidentiality.