In the Linux kernel, a high-severity vulnerability has been resolved related to Bluetooth functionality. This vulnerability allows for inadequate validation of user input in the L2CAP (Logical Link Control and Adaptation Protocol), specifically concerning the setsockopt system call. Failure to validate user input length before copying data may lead to potential exploitation.
The CVSS score for this vulnerability is 7.1, categorizing it as high severity. This rating indicates a significant risk to organizations that utilize affected versions of the Linux kernel, especially considering the nature of Bluetooth communications.
Given the potential impact on confidentiality and availability—both rated as high—organizations should prioritize patching immediately. The attack vector is local, and the complexity is low, which could facilitate exploitation if unaddressed.
Currently, there is no public exploit confirmed, and the vulnerability is not listed in the KEV (Known Exploited Vulnerabilities) catalog. However, the potential risks necessitate proactive measures to mitigate exposure.
Organizations running vulnerable versions should address this vulnerability in their patch cycle to avoid potential exploitation.
Vulnerability Details
The specific vulnerability in the Linux kernel relates to the Bluetooth subsystem, where the L2CAP implementation does not adequately validate user input when using the setsockopt system call. This vulnerability has been assigned CWE-1284, indicating issues with insufficient validation of user input.
The affected versions include Linux kernel versions from 2.6.39 up to 5.10.227, as well as versions starting from 5.11 up to 6.1.87. Additionally, it affects versions from 6.2 to 6.6.55 and from 6.7 to 6.8.7, including release candidates for version 6.9.
Organizations should refer to the specific patches released to address this vulnerability to ensure their systems are updated and secure.
Technical Analysis
The root cause of this vulnerability stems from insufficient validation mechanisms within the Bluetooth L2CAP subsystem in the Linux kernel. The attack vector is local, requiring low privileges, and it does not necessitate user interaction, thereby increasing the risk of exploitation.
The attack complexity is rated as low, making it feasible for attackers with minimal skills to exploit this vulnerability. The confidentiality impact is high, meaning that sensitive information could be exposed, while the integrity impact is none, indicating no modification of data is possible through this exploit. However, the availability impact is high, suggesting that systems could become unusable if exploited.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized access to sensitive data and disruption of services due to the high availability impact. The implications of this vulnerability could lead to significant operational challenges if not addressed promptly.
Organizations should assess their deployment of Linux kernel versions and prioritize patching. The urgency is categorized as high, given the CVSS score of 7.1 and the potential for exploitation if unaddressed.
The broad usage of Linux in various infrastructures means that the blast radius for this vulnerability could be extensive, affecting numerous devices and services relying on the kernel.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following Linux kernel versions are affected by this vulnerability: versions from 2.6.39 up to 5.10.227, 5.11 up to 6.1.87, 6.2 up to 6.6.55, and 6.7 up to 6.8.7, as well as the release candidates for version 6.9.
Mitigation & Remediation
To mitigate this vulnerability, organizations should update to the latest patched version of the Linux kernel. It is crucial to apply the updates promptly to avoid potential exploitation. In the absence of immediate patching, organizations may implement additional network controls to limit exposure.
Organizations can find more information on the necessary patches and updates through the relevant Linux kernel documentation and advisories.
Detection Guidance
Monitoring for unusual Bluetooth activity and validating logs for potential exploitation attempts is essential. System changes related to Bluetooth configurations should be scrutinized to ensure no unauthorized alterations have occurred.
AppSecure Threat Intelligence Insight
This vulnerability underscores the importance of rigorous input validation in software development, especially for components like the Linux kernel that serve as foundational technology across numerous systems. Organizations should ensure they are not only applying patches but also conducting thorough security assessments to identify potential weaknesses.
For further reading on security best practices, organizations can explore topics such as penetration testing methodology and the importance of a robust vulnerability management program to proactively address security concerns.
Additionally, organizations should consider engaging in penetration testing services to regularly assess their security posture against emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)