arm64: Prevent Instrumentation of BP Hardening Callbacks in Linux Kernel
Summary
GSD-2022-1001579: arm64: prevent instrumentation of bp hardening callbacks. Affects Kernel versions >= ec82b567a74fbdffdf418d4bb381d55f6a9096af, < cdf805717b28ff8c587121c4e0590d7fdb63bc23. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for managing hardware resources, implementing system calls, and facilitating communication between software and hardware components. The arm64 architecture is specifically designed for 64-bit ARM processors, commonly used in mobile devices, embedded systems, and server platforms. This vulnerability affects the arm64 architecture in the Linux Kernel.
Vulnerability Detail
The vulnerability identified as GSD-2022-1001579 in the Linux Kernel's arm64 architecture allows for the potential instrumentation of BP (Branch Protection) hardening callbacks. These callbacks are crucial for mitigating certain types of security vulnerabilities, such as control-flow hijacking attacks. By instrumenting these callbacks, an attacker could undermine the effectiveness of BP hardening mechanisms, potentially leading to successful exploitation of control-flow vulnerabilities. The impact and attack plausibility of this vulnerability have not yet been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The arm64 architecture in the Linux Kernel is vulnerable to potential instrumentation of BP hardening callbacks. To mitigate this vulnerability, it is recommended to update the kernel to version v5.16.19 or later. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is currently unknown as the attack plausibility has not been proven. However, if successfully exploited, it could undermine the effectiveness of BP hardening mechanisms and potentially lead to control-flow vulnerabilities being exploited.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will provide real-time monitoring and alerts for open-source vulnerabilities, including this one.
The recommended mitigation is to update the Linux Kernel to version v5.16.19 or later, which prevents the instrumentation of BP hardening callbacks.
This vulnerability was discovered by an automated process and reported in the GSD-2022-1001579 ID. The actual impact and attack plausibility have not yet been proven.
You can find more information about this vulnerability in the GSD-2022-1001579 JSON file available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1001xxx/GSD-2022-1001579.json
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