CVE-2022-22374 in Power 9 AC922 OP910
Summary
by MITRE • 03/24/2022
The BMC (IBM Power 9 AC922 OP910, OP920, OP930, and OP940) may be subject to downgrade attack which may affect its ability to operate its host. IBM X-Force ID: 221442.
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Analysis
by VulDB Data Team • 03/27/2022
The vulnerability identified as CVE-2022-22374 affects IBM Power 9 AC922 systems including models OP910, OP920, OP930, and OP940, representing a significant security concern within enterprise computing infrastructure. This weakness specifically targets the Baseboard Management Controller (BMC) which serves as a critical component for remote system management and monitoring in high-end server environments. The BMC operates as an independent processor that handles system health monitoring, firmware updates, and remote administrative functions, making it a prime target for attackers seeking persistent access to enterprise systems. The vulnerability arises from insufficient protection mechanisms that allow unauthorized parties to potentially downgrade the BMC firmware to older, less secure versions, thereby compromising the overall system integrity and operational capabilities.
The technical flaw stems from inadequate firmware downgrade protection mechanisms within the BMC implementation, creating a pathway for attackers to manipulate the system's firmware state through unauthorized downgrade operations. This weakness falls under the category of insufficient protection against downgrade attacks, which is categorized as CWE-310 in the Common Weakness Enumeration framework. The vulnerability represents a critical failure in the security architecture of the BMC firmware update process, where proper authentication, authorization, and integrity checks are either missing or insufficiently implemented. Attackers could exploit this vulnerability to roll back the BMC firmware to versions containing known security flaws or backdoors, effectively undermining the security posture of the entire system while maintaining persistent access.
The operational impact of this vulnerability extends beyond simple firmware manipulation, as it can severely compromise the host system's ability to function properly and maintain security. When a BMC downgrade occurs, the system may lose critical security features that were implemented in newer firmware versions, potentially exposing the system to additional attack vectors and reducing its overall security resilience. The attack scenario involves an unauthorized actor gaining access to the BMC management interface and executing downgrade operations that bypass normal security controls. This can result in the system operating with outdated firmware that lacks recent security patches, leaving it vulnerable to exploitation of previously patched vulnerabilities. The impact is particularly severe in enterprise environments where these systems are often deployed in mission-critical applications requiring high availability and security assurances.
Mitigation strategies for CVE-2022-22374 should focus on implementing robust firmware update policies and strengthening BMC access controls. Organizations must ensure that all BMC firmware updates are performed through secure channels with proper authentication and integrity verification mechanisms. The implementation of firmware integrity checking and secure boot processes can prevent unauthorized downgrade operations and maintain the system's security baseline. Network segmentation and access control measures should be enforced to limit administrative access to BMC interfaces, reducing the attack surface for potential exploitation. Additionally, monitoring and logging of firmware update activities should be implemented to detect any unauthorized downgrade attempts. From an ATT&CK framework perspective, this vulnerability relates to techniques involving privilege escalation and defense evasion, specifically targeting the system's firmware integrity and update mechanisms. Regular security assessments and vulnerability scanning should be conducted to identify and remediate similar weaknesses in the broader system architecture. Organizations should also maintain current firmware versions and implement proper change management procedures to ensure that all BMC operations are properly authorized and tracked.