CVE-2022-31790 in Firebox
Summary
by MITRE • 09/06/2022
WatchGuard Firebox and XTM appliances allow an unauthenticated remote attacker to retrieve sensitive authentication server settings by sending a malicious request to exposed authentication endpoints. This is fixed in Fireware OS 12.8.1, 12.5.10, and 12.1.4.
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Analysis
by VulDB Data Team • 10/13/2022
The vulnerability identified as CVE-2022-31790 represents a critical security flaw in WatchGuard Firebox and XTM series appliances that exposes sensitive authentication server configurations to unauthenticated remote attackers. This issue affects the authentication endpoints of these network security devices, which are designed to protect corporate networks from external threats while managing internal access controls. The flaw stems from insufficient authentication mechanisms at specific API endpoints that handle authentication server settings, allowing attackers to bypass normal access controls and directly retrieve configuration data without providing valid credentials. The vulnerability is particularly concerning because it affects core authentication functionality that typically requires proper authorization to access, making it a prime target for attackers seeking to compromise network security infrastructure.
The technical implementation of this vulnerability involves the manipulation of HTTP requests sent to exposed authentication endpoints within the WatchGuard appliances. When an attacker sends a specifically crafted request to these endpoints, the system fails to properly validate the requestor's authentication status before returning sensitive configuration data. This represents a classic case of inadequate input validation and access control enforcement, which falls under CWE-285 - Improper Authorization and CWE-352 - Cross-Site Request Forgery. The flaw exists in the web application layer of the Fireware OS, where authentication server settings are exposed through API endpoints that should require proper authentication before disclosure. Attackers can leverage this vulnerability to obtain credentials, authentication methods, and other sensitive information that could be used to further compromise the network infrastructure or conduct additional attacks.
The operational impact of CVE-2022-31790 extends beyond simple information disclosure, as the retrieved authentication server settings can provide attackers with critical information needed to escalate their attacks. Once an attacker gains access to these settings, they can potentially identify authentication methods, server configurations, and credential storage mechanisms that could enable them to impersonate legitimate users or gain deeper access to the network. The vulnerability affects multiple versions of the Fireware OS including 12.8.1, 12.5.10, and 12.1.4, indicating that this flaw has existed across several release lines and could potentially affect a wide range of deployed appliances. Organizations running these appliances face significant risk of unauthorized access to their authentication infrastructure, which could lead to complete network compromise if attackers can leverage the exposed information to bypass additional security controls.
Organizations should immediately implement mitigation strategies to address this vulnerability by upgrading to the fixed versions of Fireware OS mentioned in the advisory. The recommended approach includes conducting comprehensive vulnerability assessments to identify all affected appliances within the network infrastructure, followed by systematic deployment of the patched firmware versions. Network segmentation and access control measures should be enhanced to limit exposure of authentication endpoints to only trusted networks and administrative systems. Additionally, organizations should implement monitoring solutions to detect unusual access patterns to authentication endpoints and establish incident response procedures for potential exploitation attempts. The remediation process should also include reviewing and updating access controls for authentication server configurations to ensure that only authorized administrators can access these critical settings, aligning with security best practices outlined in the MITRE ATT&CK framework under the T1078 - Valid Accounts and T1566 - Phishing techniques categories.