CVE-2024-21803 is a use after free vulnerability in the Linux kernel that affects Linux on x86 and ARM architectures, particularly related to Bluetooth modules. This vulnerability allows local execution of code, which can have serious implications for system integrity and security if exploited. Its CVSS score is 3.5, categorizing it as low severity, yet organizations should not underestimate its potential impact.
Risk to organizations includes the possibility of unauthorized code execution, which could compromise sensitive data or system functionality. While the exploitation status is currently low, the presence of such vulnerabilities in widely used systems implies an inherent risk. Organizations should prioritize patching this vulnerability in their upcoming patch cycles to mitigate potential threats.
As of now, there is no known exploit publicly available for this vulnerability. However, defensive measures should be considered to prevent any potential exploitation. Organizations are advised to review their systems for affected versions of the Linux kernel and ensure they are updated accordingly.
Organizations should address this vulnerability in their priority patch cycle, ensuring that systems are secure against potential threats associated with this use after free vulnerability.
Vulnerability Details
The vulnerability is classified under CWE-416 and affects Linux kernel versions from 2.6.12-rc2 before 6.8-rc1. The primary source for this advisory is the Linux security team, reporting the issue on January 30, 2024. The CVSS score from NVD indicates a high attack complexity and low privileges required for an attack, which, while categorized as low severity, still presents a significant risk due to its local execution capabilities.
Technical Analysis
The root cause of CVE-2024-21803 lies in improper memory management within the Linux kernel's Bluetooth modules. The use after free flaw enables an attacker with low privileges to execute arbitrary code locally, which can lead to further system compromises. The attack vector for this vulnerability is local, and it requires no user interaction, making it especially concerning for systems with multiple users.
The impact of this vulnerability includes the potential for unauthorized access to sensitive information and system resources, along with a low availability impact. The complexity of the attack is high, making it less likely for non-skilled attackers to exploit it, but the potential for exploitation remains a critical concern for system administrators.
Risk & Impact Analysis
Organizations running vulnerable versions of the Linux kernel face risks that can lead to significant operational disruptions. The blast radius of this vulnerability extends to all systems using affected kernel versions, which may include a wide range of server and device deployments. Given the nature of local code execution, attackers may exploit this vulnerability to further escalate privileges or access sensitive data.
With a CVSS score of 3.5, the urgency for remediation is deemed low. However, organizations should still consider this issue as part of their overall security posture. Continuous monitoring and regular updates to the Linux kernel are recommended to ensure ongoing security against this and other potential vulnerabilities.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of the Linux kernel from 2.6.12-rc2 to 6.6.8 are affected by this vulnerability. Organizations should ensure they are running patched versions to mitigate the risk associated with CVE-2024-21803.
Mitigation & Remediation
Organizations should prioritize patching affected systems with the latest updates from the Linux kernel. If immediate patching is not feasible, consider implementing workarounds such as restricting access to Bluetooth modules until patches can be applied. Regular security assessments and configuration hardening should also be part of the security strategy.
Detection Guidance
Monitoring logs for unusual system behaviors, especially in relation to Bluetooth module activities, can help detect potential exploitation attempts. Organizations should also review system changes periodically to ensure no unauthorized code execution has occurred.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-21803 lies in its representation of ongoing issues within the Linux kernel regarding memory management. Security teams should learn from past vulnerabilities to enhance their defensive strategies against similar flaws. Regular updates and proactive vulnerability management programs are essential for maintaining system security.
For more detailed guidance on vulnerability management, organizations can refer to the vulnerability management program and consider integrating continuous security testing into their development lifecycle.
Additionally, organizations should explore penetration testing methodologies to identify and remediate vulnerabilities proactively.
To further enhance their security posture, organizations may benefit from understanding the latest trends in vulnerability exposure and adapting their strategies accordingly.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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