CVE-2021-25649 : Exploit Details and Defense Strategies

This article provides an overview of CVE-2021-25649, an information disclosure vulnerability found in Avaya Aura Utility Services that could potentially allow unauthorized access to privileged information.

Understanding CVE-2021-25649

CVE-2021-25649 is a security vulnerability affecting Avaya Aura Utility Services, allowing local users to access system functionality and configuration information intended only for privileged users.

What is CVE-2021-25649?

CVE-2021-25649 is an information disclosure vulnerability in the directory and file management component of Avaya Aura Utility Services. It impacts all 7.x versions of the software, potentially enabling unauthorized access to sensitive data.

The Impact of CVE-2021-25649

The vulnerability's impact is rated as medium severity with high confidentiality implications. While the attack complexity is low, the privilege level required for exploitation is high, posing a risk to system confidentiality.

Technical Details of CVE-2021-25649

CVE-2021-25649 has a CVSS v3.1 base score of 4.9, indicating a medium-severity vulnerability with a network-based attack vector and no availability impact. The vulnerability does not require user interaction for exploitation.

Vulnerability Description

The vulnerability allows local users to gain unauthorized access to system functionality and configuration details that should be restricted to privileged users, potentially leading to data exposure risks.

Affected Systems and Versions

Avaya Aura Utility Services versions equal to or less than 7.1.3.8 are impacted by CVE-2021-25649, with the specific affected version being 7.0.0.0.

Exploitation Mechanism

With a low attack complexity and no user interaction required, attackers with high privileges can exploit the vulnerability over the network to access confidential information.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-25649, immediate action and long-term security practices are recommended.

Immediate Steps to Take

Organizations using affected versions of Avaya Aura Utility Services should apply relevant security patches as soon as possible to address the vulnerability and prevent unauthorized information disclosure.

Long-Term Security Practices

Implementing least privilege access, regular security audits, and employee training on data confidentiality best practices can help enhance overall system security and prevent similar vulnerabilities.

Patching and Updates

Stay informed of security updates and patches released by Avaya for Avaya Aura Utility Services to ensure the software is up to date and protected against known vulnerabilities.