CVE-2021-40470 describes a high-severity privilege escalation vulnerability in the Microsoft DirectX Graphics Kernel. This vulnerability allows local attackers to gain elevated privileges on affected systems, potentially leading to unauthorized access and control. Given the high CVSS score of 7.8, organizations must understand the implications of this vulnerability and take immediate action to mitigate associated risks.
Published on October 13, 2021, this vulnerability has been modified since its initial release, reflecting ongoing assessments and updates. The vulnerability's exploitation status indicates no known public exploit exists, but its classification as high severity underscores the urgency for defenders to implement protective measures.
Organizations should prioritize patching immediately. The DirectX Graphics Kernel is integral to Windows operating systems, including Windows 10 and Windows Server editions. Thus, the risk to organizations spans multiple environments, emphasizing the need for a robust vulnerability management strategy.
The potential impact includes high confidentiality, integrity, and availability risks, making it critical for organizations to assess their exposure and take appropriate actions to secure their systems.
In addition to immediate remediation, organizations should consider ongoing monitoring and assessments to ensure compliance and security posture against similar vulnerabilities.
Vulnerability Details
This vulnerability allows local attackers to escalate privileges within the operating system. The vulnerability is classified as a privilege escalation vulnerability under CWE-269. The CVSS score is 7.8, indicating high severity, and emphasizes the need for immediate action.
The affected products include various versions of Windows 10, Windows 11, and Windows Server editions. This widespread impact necessitates a thorough review of systems in potential risk.
The vulnerability was disclosed on October 13, 2021, and has since been classified as modified, indicating that new findings or patches have been introduced.
Technical Analysis
The root cause of CVE-2021-40470 lies in improper handling within the DirectX Graphics Kernel, which allows attackers with local access to elevate their privileges. The attack vector is local, meaning that an attacker must have physical or logical access to the affected system.
The attack complexity is low, requiring minimal skill, and privileges required for exploitation are also low. There is no user interaction required for the exploitation, making it easier for attackers to execute an attack.
The potential impacts of this vulnerability are severe: it can compromise confidentiality, integrity, and availability across affected systems, leading to significant organizational risks.
Risk & Impact Analysis
Risk to organizations includes the potential for unauthorized access to sensitive systems and data, which can lead to data breaches or system compromises. The vulnerability affects multiple Windows operating systems, which are widely deployed in enterprise environments, increasing the blast radius of potential attacks.
The urgency for remediation is high, as the exploitation of this vulnerability could lead to significant operational and reputational damage. Organizations should assess their current security posture and prioritize patching this vulnerability in their patch management cycle.
Given that this vulnerability is not in the KEV catalog, it is essential for organizations to stay vigilant and monitor for any emerging threats that may leverage this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects the following versions of Microsoft products:
Windows 10 (all versions), Windows 11 (all versions), Windows Server 2016, Windows Server 2019, and Windows Server 2022. Organizations should ensure they are running the patched versions to mitigate the risk associated with this vulnerability.
Mitigation & Remediation
To remediate CVE-2021-40470, organizations should apply the latest security patches provided by Microsoft. It is crucial to stay updated on the security updates provided by the vendor. For detailed patch information, refer to the security update guide released by Microsoft.
In addition to applying patches, organizations should review their security configurations and ensure that appropriate security controls are in place to mitigate potential exploitation attempts.
Detection Guidance
Organizations should monitor logs for any unauthorized access attempts or anomalies that may indicate exploitation attempts. Key indicators include unexpected privilege changes, application errors related to the DirectX Graphics Kernel, and unusual user behaviors.
AppSecure Threat Intelligence Insight
This vulnerability highlights the ongoing risks associated with privilege escalation vulnerabilities in widely used software components. Security teams should prioritize awareness and training around such vulnerabilities to effectively manage risk in their environments.
Engaging in regular security assessments and penetration testing can help identify potential weaknesses in systems. For more information on best practices, organizations can refer to the penetration testing methodology blog post.
In conclusion, CVE-2021-40470 serves as a reminder of the importance of proactive security measures in maintaining an organization's security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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