CVE-2021-31798 : Security Advisory and Response

CyberArk Credential Provider prior to version 12.1 is impacted by a vulnerability where the encryption key space used to encrypt cache files has low entropy. This could allow a local malicious user to access the plaintext of cache files.

Understanding CVE-2021-31798

This CVE affects the CyberArk Credential Provider software, exposing a flaw that could be exploited by local attackers to compromise sensitive information.

What is CVE-2021-31798?

The vulnerability in CyberArk Credential Provider before version 12.1 results from a low entropy key space used for encrypting cache files. This weakness enables a malicious local user to retrieve the plaintext content of these cached files under specific conditions.

The Impact of CVE-2021-31798

The impact of this vulnerability is significant as it could lead to unauthorized access to sensitive data stored in cache files by exploiting the weakness in the encryption key space.

Technical Details of CVE-2021-31798

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

Vulnerability Description

The vulnerability arises from the inadequate entropy of the key space utilized for encrypting cache files in CyberArk Credential Provider versions prior to 12.1, which facilitates plaintext extraction by malicious local users.

Affected Systems and Versions

All versions of CyberArk Credential Provider preceding 12.1 are impacted by this vulnerability.

Exploitation Mechanism

A local malicious user can take advantage of the low entropy encryption key space to access and retrieve plaintext data from the cache files stored by CyberArk Credential Provider.

Mitigation and Prevention

In this section, we outline the immediate steps to take and recommend security practices to mitigate the risks associated with CVE-2021-31798.

Immediate Steps to Take

Immediately update CyberArk Credential Provider to version 12.1 or above to eliminate the vulnerability and enhance security.

Long-Term Security Practices

Implement robust security measures such as regular security audits, access controls, and encryption best practices to safeguard sensitive data.

Patching and Updates

Stay informed about security patches and updates for CyberArk Credential Provider to address vulnerabilities promptly and ensure the ongoing security of your systems.