CVE-2021-35654 : Exploit Details and Defense Strategies

A vulnerability has been identified in the Essbase Administration Services product of Oracle Essbase, specifically in the EAS Console component. This vulnerability, assigned the CVE ID CVE-2021-35654, affects versions prior to 11.1.2.4.046 and prior to 21.3. An unauthenticated attacker with network access via HTTP can exploit this vulnerability to compromise Essbase Administration Services, leading to potential Denial of Service (DoS) attacks.

Understanding CVE-2021-35654

This section delves into the key aspects of the CVE-2021-35654 vulnerability, including its description, impact, affected systems, and exploitation mechanism.

What is CVE-2021-35654?

The vulnerability in Essbase Administration Services allows unauthenticated attackers to compromise the service via network access. Successful exploitation can lead to unauthorized disruption, including crashes or hangs on Essbase Administration Services.

The Impact of CVE-2021-35654

The CVSS 3.1 Base Score for CVE-2021-35654 is 7.5, indicating a high impact on availability. The vulnerability's vector string specifies that the attack complexity is low, but the availability impact is high.

Technical Details of CVE-2021-35654

This section provides detailed technical insights into CVE-2021-35654.

Vulnerability Description

The vulnerability in Essbase Administration Services enables unauthorized network-based attackers to compromise the service, potentially causing repeated crashes or hangs.

Affected Systems and Versions

CVE-2021-35654 impacts versions of Hyperion Essbase Administration Services prior to 11.1.2.4.046 and prior to 21.3.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging unauthenticated network access via HTTP to compromise Essbase Administration Services, leading to DoS scenarios.

Mitigation and Prevention

To safeguard systems from CVE-2021-35654, immediate steps, long-term security practices, and the importance of patching and updates are outlined.

Immediate Steps to Take

Implement network security measures, restrict access to vulnerable services, and monitor network traffic for suspicious activities.

Long-Term Security Practices

Regularly update and patch systems, conduct security assessments, and educate users on safe online practices to enhance overall security posture.

Patching and Updates

Apply vendor-recommended patches promptly, stay informed about security alerts, and maintain a proactive approach to addressing vulnerabilities to mitigate risks.