CVE-2021-33137 is a high-severity vulnerability classified due to an out-of-bounds write in the Intel(R) Kernelflinger project. This vulnerability allows an authenticated user to potentially enable escalation of privilege via local access. The CVSS score for this vulnerability stands at 7.8, indicating a high level of risk. Organizations should prioritize patching immediately to mitigate potential exploitation.
The vulnerability was published on February 9, 2022, and has been categorized under CWE-787, which pertains to out-of-bounds writes. The potential for exploitation is significant, as it may lead to unauthorized access and control over the affected systems.
Risk to organizations includes the possibility of local users gaining elevated privileges, which can lead to further security breaches and data compromise. Given its high severity and the nature of the vulnerability, organizations must act quickly to remediate it.
As of now, there are no known exploits publicly available, but the potential for local exploitation remains a concern. Organizations should address this issue in their priority patch cycle to safeguard their systems.
Vulnerability Details
This vulnerability allows an authenticated user to potentially enable escalation of privilege via local access.
The CVSS score is 7.8, indicating a high severity level. Affected products include the Intel Kernelflinger, with the vulnerability present in all versions prior to the vendor patch released after June 28, 2021.
The official description of the vulnerability highlights the risk of privilege escalation, which can severely impact system integrity. The publication date of this vulnerability is February 9, 2022, with the last modification made on May 5, 2025.
Technical Analysis
The root cause of CVE-2021-33137 is an out-of-bounds write, allowing an authenticated user to manipulate memory in a way that could lead to privilege escalation. The attack vector is local, meaning that the attacker needs to have access to the local system to exploit this vulnerability.
The attack complexity is classified as low, requiring minimal technical knowledge to execute. Privileges required for exploitation are also low, allowing users with basic access to potentially leverage this vulnerability.
User interaction is not required, which increases the risk of exploitation. This vulnerability impacts confidentiality, integrity, and availability, all rated high, indicating a significant risk to organizations’ data and systems.
Risk & Impact Analysis
Organizations utilizing Intel Kernelflinger are at a heightened risk due to the nature of this vulnerability. The potential for local exploitation can lead to unauthorized access and control over sensitive systems and data.
The blast radius of this vulnerability could be significant, especially in environments where local access is prevalent. The urgency for organizations to address this vulnerability is critical, particularly in light of the high CVSS score.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Intel Kernelflinger prior to the vendor patch released on June 28, 2021, are affected by this vulnerability.
Mitigation & Remediation
Organizations should apply the latest patches provided by Intel to remediate this vulnerability. It is crucial to upgrade to versions of Kernelflinger that are released after the identified vulnerable versions. If a patch is unavailable, consider implementing additional security controls to limit local access to the system.
Continual monitoring and security assessments should be conducted to maintain system integrity and to ensure that no unauthorized access occurs during this period.
Detection Guidance
Monitor logs for any indicators of unauthorized access attempts or unusual system behavior. Additionally, system changes that could indicate exploitation should be closely observed.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-33137 highlights the importance of securing local access points within organizational infrastructures. This vulnerability represents a pattern of attacks that target local systems to exploit privileges.
Security teams should leverage insights from this incident to strengthen their defenses against similar vulnerabilities. For further reading on best practices for penetration testing and vulnerability management, organizations can refer to resources such as the penetration testing methodology and the vulnerability management program design guides.
To further enhance security, organizations should consider the benefits of red teaming as a service to identify and address weaknesses proactively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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