Mitigating CVE-2024-29739: Addressing Information Disclosure in Android Kernel
Overview of CVE-2024-29739
On April 5, 2024, Google published details of a vulnerability identified as CVE-2024-29739. This vulnerability affects the Android kernel and is classified as an information disclosure issue. The underlying problem resides in the tmu_get_temp_lut function of tmu.c, where a missing bounds check allows a possible out-of-bounds read. This flaw can lead to local information disclosure without the need for additional execution privileges, and user interaction is not necessary for exploitation.
Technical Details
The vulnerability stems from a missing bounds check in the tmu_get_temp_lut function. This oversight in bounds validation could enable an attacker with local access to read sensitive information from memory. The critical properties of CVE-2024-29739 are summarized as follows:
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- Confidentiality Impact: High
- Integrity Impact: None
- Availability Impact: None
This vulnerability is scored at a base value of 5.5 on the CVSS v3.1 scale, placing it in the medium severity category.
Mitigation Strategies
To safeguard against CVE-2024-29739, it is crucial to implement the following mitigation measures:
- Update to Latest Android Security Patch: Android users should ensure that their devices are updated to the latest security patch level released after April 5, 2024. Google frequently releases security bulletins that address known vulnerabilities, including CVE-2024-29739. Refer to the official Android Security Bulletin for patch details: Android Security Bulletin.
- Employ Security Monitoring Tools: Utilize mobile device management (MDM) solutions to monitor for any suspicious activities that could indicate an attempt to exploit this or similar vulnerabilities. MDM tools can provide real-time alerts and comprehensive reports on device security status.
- Implement Least Privilege Principle: Restrict the installation of applications and services to those that are absolutely necessary. Reducing the permissions required by apps can help minimize the impact of any potential exploits by limiting access to sensitive system functions and data.
- Educate Users: User awareness is a critical component of mitigating security risks. Educate users about the importance of applying updates and recognizing potential security threats to help prevent the exploitation of this vulnerability.
Conclusion
CVE-2024-29739 is a notable vulnerability in the Android kernel that could lead to information disclosure through an out-of-bounds read. While exploitation requires local access, implementing the recommended mitigation strategies can significantly enhance the security posture of affected devices. Keeping devices updated, employing security tools, adhering to the principle of least privilege, and educating users are fundamental steps to mitigate the risk posed by this and other similar vulnerabilities.
