CVE-2021-34731 Explained : Impact and Mitigation

A stored cross-site scripting vulnerability was discovered in the web-based management interface of Cisco Prime Access Registrar. This vulnerability could allow a remote attacker to execute arbitrary script code on the affected system. Here's everything you need to know about CVE-2021-34731.

Understanding CVE-2021-34731

Cisco Prime Access Registrar is impacted by a stored cross-site scripting vulnerability that could be exploited by an authenticated, remote attacker to inject malicious code into specific pages of the web-based management interface.

What is CVE-2021-34731?

The vulnerability in Cisco Prime Access Registrar's web-based management interface allows an attacker to execute arbitrary script code with administrative credentials, compromising sensitive information.

The Impact of CVE-2021-34731

A successful exploit could result in the execution of arbitrary script code in the context of the affected interface or unauthorized access to browser-based information, potentially leading to further cyber threats.

Technical Details of CVE-2021-34731

The vulnerability has a CVSSv3.1 base score of 4.8, with low attack complexity and network-based attack vector. Detailed technical information includes:

Vulnerability Description

The flaw stems from insufficient input validation in the web-based management interface, enabling the injection of malicious code by an authenticated attacker.

Affected Systems and Versions

Product: Cisco Prime Access Registrar
Vendor: Cisco
Vulnerable Version: Not Applicable

Exploitation Mechanism

An attacker with valid administrative credentials can insert malicious code into specific pages of the interface, allowing for the execution of arbitrary scripts.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2021-34731.

Immediate Steps to Take

Monitor Cisco's security advisory for software updates addressing the vulnerability.
Restrict access to the affected interface to authorized personnel only.

Long-Term Security Practices

Regularly update the software and apply patches released by Cisco.
Conduct security training to educate users on recognizing and preventing social engineering attacks.

Patching and Updates

Cisco is expected to release software updates to rectify the vulnerability in the affected systems.