CVE-2022-25290 in Firebox
Summary
by MITRE • 02/24/2022
WatchGuard Firebox and XTM appliances allow an authenticated remote attacker with unprivileged credentials to retrieve certificate private keys. This vulnerability impacts Fireware OS before 12.7.2_U2, 12.x before 12.1.3_U8, and 12.2.x through 12.5.x before 12.5.9_U2.
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Analysis
by VulDB Data Team • 02/26/2022
This vulnerability exists within WatchGuard Firebox and XTM appliances running specific versions of Fireware OS, presenting a critical security risk that allows authenticated remote attackers with unprivileged credentials to extract private certificate keys. The flaw stems from insufficient access controls and improper privilege enforcement within the appliance's certificate management system, enabling attackers who have established a basic user session to escalate their access to retrieve sensitive cryptographic materials. The vulnerability specifically affects Fireware OS versions prior to 12.7.2_U2, 12.x versions before 12.1.3_U8, and 12.2.x through 12.5.x before 12.5.9_U2, indicating a widespread impact across multiple release branches of the operating system.
The technical implementation of this vulnerability involves a weakness in the certificate handling subsystem where the system fails to properly validate the privileges of authenticated users attempting to access certificate private keys. This represents a clear violation of the principle of least privilege and demonstrates inadequate access control mechanisms. The flaw allows an attacker who has already established an authenticated session to bypass normal access controls and extract private keys that should only be accessible to system administrators or users with explicit cryptographic key management permissions. This vulnerability aligns with CWE-284, which addresses improper access control, and specifically relates to inadequate privilege checks during certificate operations.
The operational impact of this vulnerability is severe and far-reaching for organizations relying on WatchGuard appliances for network security. When private keys are extracted, attackers gain the ability to impersonate legitimate services, decrypt sensitive communications, and potentially establish persistent backdoors within the network infrastructure. The compromise of certificate private keys undermines the fundamental security of encrypted communications, digital signatures, and authentication mechanisms that depend on these cryptographic materials. Organizations may experience significant regulatory and compliance violations, particularly in environments governed by standards such as pci dss, hipaa, and soc 2, where certificate management and key security are mandatory requirements.
Mitigation strategies for this vulnerability require immediate patching of affected appliances to the latest Fireware OS versions that contain the necessary security fixes. Organizations should also implement network segmentation and monitoring to detect unauthorized access attempts to certificate management interfaces. The principle of defense in depth should be applied by restricting access to certificate management functions through additional authentication layers and implementing strict access control policies. Security teams should conduct thorough certificate audits to identify and replace any compromised keys, while also enhancing logging and monitoring capabilities to detect potential exploitation attempts. This vulnerability demonstrates the importance of maintaining up-to-date security patches and proper privilege management within network infrastructure devices, aligning with ATT&CK technique T1552.001 for credentials from password stores and T1071.001 for application layer protocol.