CVE-2021-29448 : Security Advisory and Response
Learn about CVE-2021-29448, a Stored DOM XSS vulnerability in Pi-hole Admin Web Interface. Understand its impact, affected systems, and mitigation steps to secure your systems.
Pi-hole, a Linux network-level advertisement and Internet tracker blocking application, is affected by a Stored DOM XSS vulnerability in its AdminLTE portal. This flaw can be exploited by a malicious actor with network access to the DNS server. The CVSS score for this vulnerability is 7.6, indicating a high severity level. To mitigate the risk, users should apply the necessary patches provided in the GitHub security advisory.
Understanding CVE-2021-29448
This section delves into the details of the vulnerability in Pi-hole's Admin interface.
What is CVE-2021-29448?
CVE-2021-29448 is a Stored DOM XSS vulnerability discovered in the Pi-hole AdminLTE portal, allowing attackers with network access to execute malicious scripts.
The Impact of CVE-2021-29448
The impact of this vulnerability is deemed high, with a CVSS base score of 7.6. Attackers can exploit this flaw to compromise the integrity and availability of the affected systems.
Technical Details of CVE-2021-29448
Here, we explore the technical aspects of the CVE-2021-29448 vulnerability.
Vulnerability Description
The Stored XSS vulnerability in Pi-hole's Admin interface arises due to improper neutralization of user-supplied input during web page generation, enabling malicious script execution.
Affected Systems and Versions
The vulnerability affects Pi-hole instances using AdminLTE versions up to 5.4.
Exploitation Mechanism
Attackers can exploit this vulnerability by injecting and executing malicious scripts in the Pi-hole Admin portal, leading to potential security breaches.
Mitigation and Prevention
This section provides insights on how to mitigate and prevent the exploitation of CVE-2021-29448.
Immediate Steps to Take
Users are advised to implement the necessary security patches provided in the GitHub security advisory to address the Stored DOM XSS vulnerability.
Long-Term Security Practices
Maintaining regular security updates, conducting security assessments, and monitoring network traffic can help prevent similar vulnerabilities in the future.
Patching and Updates
Users should ensure that their Pi-hole installations are updated to the latest version that contains the patch for CVE-2021-29448 to safeguard their systems against potential attacks.