CVE-2023-6789 : Exploit Details and Defense Strategies

This CVE-2023-6789 pertains to a stored Cross-Site Scripting (XSS) vulnerability found in the web interface of Palo Alto Networks PAN-OS software. It enables a malicious authenticated read-write administrator to execute a JavaScript payload that can impersonate actions of other administrators.

Understanding CVE-2023-6789

This vulnerability allows an attacker with authenticated access to the web interface to store and execute a JavaScript payload, potentially leading to unauthorized actions being performed under the guise of legitimate administrators.

What is CVE-2023-6789?

CVE-2023-6789 is a Cross-Site Scripting (XSS) vulnerability in Palo Alto Networks PAN-OS software, where a malicious actor can utilize the web interface to execute JavaScript payloads under the identity of other authenticated administrators.

The Impact of CVE-2023-6789

The impact of this vulnerability is rated as MEDIUM with a CVSSv3.1 base score of 4.3. While the attack complexity is low, the privileges required are high, making it essential to address this issue promptly.

Technical Details of CVE-2023-6789

This section delves into the specifics of the vulnerability, including the description, affected systems, and the exploitation mechanism.

Vulnerability Description

The XSS vulnerability in Palo Alto Networks PAN-OS software permits a malicious authenticated administrator to store and execute JavaScript payloads through the web interface, potentially leading to unauthorized system access and actions.

Affected Systems and Versions

The affected versions include PAN-OS 8.1 (up to 8.1.26), PAN-OS 9.0 (up to 9.0.17-h4), PAN-OS 9.1 (up to 9.1.17), PAN-OS 10.0, PAN-OS 10.1 (up to 10.1.11), PAN-OS 10.2 (up to 10.2.5), PAN-OS 11.0 (up to 11.0.2), and PAN-OS 11.1.

Exploitation Mechanism

An attacker, with appropriate authenticated access to the web interface, can store and execute JavaScript payloads, allowing them to perform actions within the system, pretending to be unsuspecting authenticated administrators.

Mitigation and Prevention

To mitigate the risks posed by CVE-2023-6789, immediate steps can be taken along with the adoption of long-term security practices and applying necessary patches and updates.

Immediate Steps to Take

Ensure that administrators follow best practices for securing access to the PAN-OS web interface. Consider restricting access rights and monitoring for any suspicious activities to prevent unauthorized exploitation of this vulnerability.

Long-Term Security Practices

Implement security controls such as regular security audits, training for administrators on recognizing and mitigating XSS vulnerabilities, and staying informed about security updates provided by Palo Alto Networks.

Patching and Updates

The issue has been addressed in PAN-OS versions 8.1.26, 9.0.17-h4, 9.1.17, 10.1.11, 10.2.5, 11.0.2, and later versions. It is imperative to apply these patches promptly to safeguard against potential exploitation of this vulnerability.