CVE-2022-26355 : What You Need to Know

A detailed analysis of the Citrix Federated Authentication Service (FAS) vulnerability affecting versions 7.17 to 10.6.

Understanding CVE-2022-26355

This section will provide an overview of the CVE-2022-26355 vulnerability affecting Citrix Federated Authentication Service (FAS) versions 7.17 to 10.6.

What is CVE-2022-26355?

The CVE-2022-26355 vulnerability involves Citrix Federated Authentication Service (FAS) versions 7.17 to 10.6 improperly storing a registration authority certificate's private key in the Microsoft Software Key Storage Provider (MSKSP) instead of a Trusted Platform Module (TPM).

The Impact of CVE-2022-26355

The impact of this vulnerability is limited to deployments configured to store the registration authority certificate's private key in a TPM using PowerShell, leading to incorrect storage in MSKSP. The issue does not occur if TPM usage is not selected or if the configuration is performed via the FAS administration console.

Technical Details of CVE-2022-26355

This section will delve into the technical aspects of CVE-2022-26355.

Vulnerability Description

The vulnerability arises in Citrix Federated Authentication Service (FAS) versions 7.17 to 10.6 due to misconfiguration during the storage of private keys, resulting in data integrity risks.

Affected Systems and Versions

Citrix FAS versions 7.17 to 10.6 are impacted by this vulnerability, particularly in deployments using PowerShell for key storage configuration.

Exploitation Mechanism

Exploitation of this vulnerability involves manipulating the key storage process in deployments using PowerShell with TPM selection for key storage.

Mitigation and Prevention

This section will highlight steps to mitigate and prevent exploitation of CVE-2022-26355.

Immediate Steps to Take

Immediately disable TPM selection for key storage in Citrix FAS deployments and verify key storage mechanisms to prevent data exposure.

Long-Term Security Practices

Ensure secure key management practices and regular security audits to identify misconfigurations in key storage processes.

Patching and Updates

Apply vendor-recommended patches and updates to Citrix FAS versions 7.17 to 10.6 to address the key storage vulnerability.