CVE-2021-33103 is identified as a medium-severity vulnerability affecting certain Intel processors. This vulnerability allows an unintended intermediary in the BIOS authenticated code module, which may enable a privileged user to potentially facilitate privilege escalation via local access. With a CVSS score of 6.7, this vulnerability poses a significant risk to organizations that rely on affected Intel hardware.
The potential for exploitation is concerning, particularly as it can be exploited locally with high privileges. Organizations that do not address this vulnerability may expose themselves to unauthorized access and control over sensitive systems or data. Therefore, it is crucial for organizations to prioritize patching immediately.
Intel has announced patches to remediate this vulnerability, and organizations are encouraged to apply these updates as part of their security management processes. The urgency to address such vulnerabilities cannot be overstated, especially given the potential for exploitation in local environments.
Monitoring for signs of exploitation and ensuring timely updates to firmware and security patches are essential steps in maintaining organizational security posture.
Vulnerability Details
This vulnerability allows unintended intermediary behavior in the BIOS authenticated code module for some Intel processors, potentially enabling privilege escalation via local access. The CVSS score of 6.7 classifies this vulnerability as medium severity, indicating a moderate level of risk associated with its exploitation.
The affected products include various firmware versions for Intel Xeon and Core processors, demonstrating a broad impact across Intel's hardware offerings. The vulnerability was published on May 12, 2022, and has been classified under CVE with a high confidentiality, integrity, and availability impact.
Technical Analysis
Root cause analysis indicates that the vulnerability arises from improper handling within the BIOS authenticated code module. Attackers may exploit this vulnerability through local access, with the required privileges set to high. User interaction is not required, and the attack complexity remains low, making it easier for attackers to exploit this vulnerability if they gain local access.
The impact on confidentiality, integrity, and availability is assessed as high. This indicates that exploitation could result in unauthorized access to sensitive data, modifications to system integrity, and potential disruptions to service availability.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to critical systems and data, leading to potential data breaches or system compromise. The broad deployment of affected Intel processors increases the likelihood of successful exploitation, necessitating immediate action for remediation. The CVSS score and the KEV status further emphasize the urgency of this vulnerability, as it requires prompt attention in the security patch cycle.
Organizations should assess the blast radius of this vulnerability across their infrastructure, especially in environments where local access may be more easily attained. With the potential for significant impact, a proactive approach to vulnerability management is essential.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability impacts multiple firmware versions across Intel's Xeon and Core i3/i5/i7/i9 processors. Specific versions affected include firmware for the Xeon E-2386G, E-2374G, E-2314, Core i3 series, and Core i5/i7/i9 series. Organizations should refer to their firmware documentation to determine if their systems are vulnerable.
Mitigation & Remediation
Intel has released patches for the affected firmware versions. Organizations are advised to update their systems to the latest firmware to mitigate the risks associated with CVE-2021-33103. If patches are not immediately available, organizations should implement network segmentation and access controls to limit potential exploitation.
Organizations should also consider conducting a comprehensive security assessment, including penetration testing, to identify any other potential vulnerabilities within their systems. For assistance with this process, organizations can refer to our penetration testing services to ensure their defenses are robust.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual access patterns, especially from privileged accounts. Implementing behavioral anomaly detection can help identify unauthorized activities. Regular audits of firmware versions in use and prompt application of security patches are crucial for maintaining security posture.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-33103 lies in its demonstration of the vulnerabilities inherent in widely deployed hardware. This incident serves as a reminder for security teams to assess their hardware security practices continuously. As the landscape of threats evolves, organizations must remain vigilant and adaptable to protect against emerging risks.
To better prepare for potential threats, organizations should establish a proactive security culture and invest in continuous education for their security teams. Engaging in penetration testing and vulnerability management programs will enhance their resilience against threats.
Moreover, organizations should not overlook the importance of threat intelligence sharing, as collaboration within the security community can lead to better overall defenses.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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