Bluetooth Vulnerabilities CVE-2024-6137, CVE-2024-6135, CVE-2024-5931, CVE-2024-6259, CVE-2024-6258, CVE-2024-5754
CVE-2024-6137: SDP Out-of-Bounds Access in get_att_search_list
Overview
CVE-2024-6137 is a critical vulnerability found in the Bluetooth Classic stack, specifically within the Service Discovery Protocol (SDP) implementation. This vulnerability is characterized by out-of-bounds (OOB) access in the `get_att_search_list` function, which can lead to unauthorized memory access, potentially allowing attackers to read or manipulate sensitive data.
Technical Details
The vulnerability arises when the `get_att_search_list` function processes requests without sufficient validation of input parameters. This oversight can result in accessing memory locations beyond the allocated buffer, leading to undefined behavior. If exploited, attackers could read arbitrary memory contents or cause application crashes.
The CVSS score assigned to this vulnerability is **7.5**, indicating high severity. The potential impact includes data leakage and system instability, making it a significant concern for users of Bluetooth technology.
Mitigation Strategies
To mitigate the risks associated with CVE-2024-6137, developers should:
- Implement strict input validation checks within the `get_att_search_list` function.
- Ensure that all input parameters are validated against expected ranges before processing.
- Regularly update the Bluetooth stack to incorporate patches that address this vulnerability.
Conclusion
CVE-2024-6137 poses a significant security risk within the Bluetooth Classic stack. Organizations utilizing Bluetooth technology should prioritize applying updates and implementing robust input validation to protect against potential exploitation.
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CVE-2024-6135: Multiple Missing Buffer Length Checks in Bluetooth Classic
Summary
CVE-2024-6135 highlights multiple vulnerabilities in the Bluetooth Classic stack due to missing buffer length checks. These vulnerabilities can lead to buffer overflows, allowing attackers to execute arbitrary code or cause denial of service.
Technical Analysis
The vulnerabilities stem from several functions within the Bluetooth Classic implementation that fail to verify the length of buffers before writing data. This oversight can result in writing beyond the allocated memory, leading to potential crashes or unauthorized code execution.
The CVSS score for this vulnerability is rated at **6.8**, indicating medium to high severity. The impact can vary from application instability to serious security breaches, depending on the context in which the Bluetooth stack is used.
Recommendations for Mitigation
To address CVE-2024-6135, it is recommended to:
- Implement comprehensive buffer length checks in all relevant functions within the Bluetooth stack.
- Conduct thorough code reviews and testing to identify and rectify similar vulnerabilities.
- Ensure that all components of the Bluetooth stack are updated to the latest versions that contain necessary security patches.
Conclusion
CVE-2024-6135 serves as a reminder of the importance of rigorous input validation and buffer management in software development, particularly in security-sensitive applications like Bluetooth. Organizations should take proactive steps to mitigate these vulnerabilities to safeguard their systems.
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CVE-2024-5931: Unchecked User Input in bap_broadcast_assistant
Introduction
CVE-2024-5931 is a vulnerability affecting the Bluetooth stack in the Zephyr RTOS, specifically within the `bap_broadcast_assistant` function. This vulnerability arises from unchecked user input, which can lead to potential stack overflows and subsequent denial of service attacks.
Detailed Description
The vulnerability occurs in the `parse_recv_state` function, where the `recv_state->num_subgroups` value is derived directly from user input without validation. This value is then used as the upper limit in a for loop, allowing an attacker to craft input that exceeds the allocated memory for the `recv_state` array.
The CVSS score for this vulnerability is **6.3**, indicating medium severity. Exploiting this vulnerability could lead to application crashes or instability, making it a significant concern for users of the Zephyr RTOS.
Mitigation Steps
To mitigate the risks associated with CVE-2024-5931, users should:
- Update to the latest version of the Zephyr RTOS that includes patches for this vulnerability.
- Implement input validation checks to ensure that user-provided values do not exceed predefined limits.
- Regularly review and audit code for similar vulnerabilities to enhance overall security posture.
Conclusion
CVE-2024-5931 underscores the critical need for input validation in software development. Users of the Zephyr RTOS should take immediate action to update their systems and implement best practices for security to prevent potential exploitation.
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CVE-2024-6259: Improper Discarding in adv_ext_report
Overview
CVE-2024-6259 is a vulnerability in the Bluetooth stack related to improper handling of advertising extension reports. This issue can lead to the failure to discard unnecessary or malformed reports, potentially resulting in memory leaks or denial of service.
Technical Details
The vulnerability arises when the Bluetooth stack processes advertising extension reports without adequately checking their validity. Malformed reports may not be discarded properly, leading to resource exhaustion or crashes.
The CVSS score assigned to this vulnerability is **5.5**, indicating moderate severity. The potential impact includes degraded performance and system instability.
Mitigation Strategies
To mitigate this vulnerability, developers should:
- Implement proper validation checks for advertising extension reports.
- Ensure that malformed or unnecessary reports are discarded appropriately.
- Regularly update the Bluetooth stack to include fixes for this vulnerability.
Conclusion
CVE-2024-6259 highlights the importance of robust error handling in Bluetooth stack implementations. Developers must prioritize updates and implement validation checks to maintain system stability and security.
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CVE-2024-6258: Missing Length Checks in rfcomm_handle_data
Summary
CVE-2024-6258 identifies a vulnerability in the Bluetooth stack due to missing length checks in the `rfcomm_handle_data` function. This oversight can lead to buffer overflows and potential arbitrary code execution.
Technical Analysis
The vulnerability occurs when the `rfcomm_handle_data` function processes incoming data without verifying the length of the buffer. This can allow attackers to send crafted data that exceeds the expected size, leading to memory corruption.
The CVSS score for this vulnerability is **6.0**, indicating medium severity. The impact can range from application crashes to unauthorized code execution.
Recommendations for Mitigation
To address CVE-2024-6258, it is essential to:
- Implement length checks in the `rfcomm_handle_data` function.
- Conduct thorough testing to identify similar vulnerabilities.
- Update the Bluetooth stack to the latest version with necessary patches.
Conclusion
CVE-2024-6258 serves as a reminder of the critical need for input validation in network protocols. Developers should prioritize implementing checks to prevent potential exploitation.
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CVE-2024-5754: Encryption Procedure Host Vulnerability
Overview
CVE-2024-5754 is a vulnerability in the Bluetooth stack related to encryption procedures. This vulnerability can allow unauthorized access to sensitive data due to improper handling of encryption keys.
Technical Details
The vulnerability arises when the Bluetooth stack processes encryption requests without adequately validating the encryption keys. This can lead to unauthorized decryption of sensitive data, exposing it to potential attackers.
The CVSS score assigned to this vulnerability is **7.0**, indicating high severity. The potential impact includes data breaches and unauthorized access to sensitive information.
Mitigation Strategies
To mitigate the risks associated with CVE-2024-5754, developers should:
- Implement strict validation checks for encryption keys.
- Regularly update the Bluetooth stack to incorporate security patches.
- Conduct thorough security audits to identify and rectify similar vulnerabilities.
Conclusion
CVE-2024-5754 highlights the critical importance of secure encryption practices in Bluetooth technology. Organizations must prioritize updates and implement robust security measures to protect sensitive data from unauthorized access.
Citations:
- https://nvd.nist.gov/