Bluetooth: Memory Leak Vulnerability in Linux Kernel
Summary
GSD-2022-1001050: Bluetooth: use memset avoid memory leaks. Affects Kernel versions < d588c183a971b85c775ad66da563ee6e8bc8158f. 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 the system, including device drivers, process management, memory management, and more. The Bluetooth subsystem in the Linux Kernel enables communication with Bluetooth devices, allowing users to connect and interact with them wirelessly. However, a vulnerability has been discovered in the Bluetooth implementation that can lead to memory leaks.
Vulnerability Detail
The vulnerability in the Linux Kernel's Bluetooth implementation arises from a failure to properly clear memory using the memset function. This can result in memory leaks, where allocated memory is not freed after use, leading to potential resource exhaustion and system instability. An attacker could potentially exploit this vulnerability to exhaust system resources, causing denial-of-service conditions or even executing arbitrary code with elevated privileges. The vulnerability has been assigned the ID GSD-2022-1001050 and has been fixed in Linux Kernel version v5.17.3 through commit d588c183a971b85c775ad66da563ee6e8bc8158f.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can apply a patch or modify the affected code manually to ensure proper memory clearing. Here is an example of a code modification that uses memset to address the vulnerability:
void clear_memory(void *ptr, size_t size) {
memset(ptr, 0, size);
}
Conclusion
In conclusion, a memory leak vulnerability has been identified in the Bluetooth implementation of the Linux Kernel. This vulnerability can lead to resource exhaustion and potential code execution with elevated privileges. It is crucial to update the Linux Kernel to version v5.17.3 or later to mitigate these risks. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
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FAQ
The vulnerability can lead to memory leaks, potentially causing resource exhaustion and system instability. It may also allow attackers to execute arbitrary code with elevated privileges.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this Bluetooth memory leak vulnerability.
At the time of this report, no known exploits have been documented for this vulnerability. However, it is crucial to apply the recommended fix or update to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if an attacker can establish a Bluetooth connection with the affected system. It is important to update the Linux Kernel to the fixed version to prevent potential remote exploitation.
The recommended mitigation is to update the Linux Kernel to the fixed version. Applying patches or modifying the code manually can serve as temporary mitigations until the update is applied.
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