CVE-2025-20645: A Critical Security Flaw in MediaTek KeyInstall
MediaTek, a leader in the semiconductor industry, recently published a critical security advisory detailing a vulnerability identified as CVE-2025-20645. This vulnerability primarily affects the KeyInstall component of various MediaTek processors, where a lack of bounds checking can lead to an out-of-bounds write. Assigned the Common Weakness Enumeration identifier CWE-787, this flaw poses a significant risk when exploited by a malicious actor possessing System privileges.
Affected Devices and Versions
The vulnerability impacts numerous processors from MediaTek, specifically models MT6765, MT6768, MT6833, MT6835, MT6853, MT6855, MT6879, MT6886, MT6893, MT6897, MT6983, MT6985, MT6989, and MT8796. Devices running Android 14.0 and 15.0 are particularly susceptible. The vulnerability allows attackers to perform actions beyond the intended bounds of a memory buffer, potentially enabling escalated privileges and execution of arbitrary code.
Mitigation Strategies
To effectively mitigate the risks associated with CVE-2025-20645, organizations and individuals should implement the following measures:
- Patch Systems Promptly: MediaTek has released a patch addressing this vulnerability. The recommended patch, identified as ALPS09475476, should be applied immediately to all affected devices to mitigate the risk of exploitation.
- System Privilege Controls: Since exploitation requires System-level access, ensure robust controls over user privileges. Implement user account management practices that limit the number of users with elevated privileges.
- Monitor Security Bulletins: Keep abreast of security bulletins and updates from MediaTek and relevant partners. Frequent updates are crucial to maintaining secure systems.
- Security Enhancements: Consider deploying additional security solutions such as mobile threat defense tools to detect and prevent misuse of high-risk permissions.
For further details, please refer to the official MediaTek product security bulletin for March 2025.
Conclusion
Understanding and mitigating vulnerabilities like CVE-2025-20645 is critical for maintaining the security and integrity of systems relying on MediaTek processor technology. By promptly applying patches and reinforcing privilege management, organizations can effectively navigate and neutralize potential security threats associated with this vulnerability.