Use After Free Vulnerability in Bluetooth: hci_send_acl
Summary
GSD-2022-1002475: Bluetooth: Fix use after free in hci_send_acl. Affects Kernel versions < c41de54b0a963e59e4dd04c029a4a6d73f45ef9c. No fix is published. How to fix ↓
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Background
The affected package is the Linux Kernel, which is a critical component of the Linux operating system. It provides the core functionality and interfaces for the system to interact with hardware devices, including Bluetooth. The hci_send_acl function in the Bluetooth subsystem is responsible for sending data packets over the ACL (Asynchronous Connection-Less) link. This vulnerability specifically affects the hci_send_acl function, leading to a use after free vulnerability.
Vulnerability Detail
The use after free vulnerability in hci_send_acl occurs when the function attempts to access memory that has already been freed. This can result in a variety of issues, including crashes, memory corruption, and potentially remote code execution. An attacker could exploit this vulnerability by sending specially crafted Bluetooth packets, causing the system to access freed memory and potentially execute arbitrary code. The impact and attack plausibility of this vulnerability have not been proven, but it is considered a security risk.
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. The recommended approach is to update the Linux Kernel to the fixed version.
Conclusion
The use after free vulnerability in hci_send_acl poses a potential security risk in the Linux Kernel. Users are advised to update their Linux Kernel to version v4.9.311 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is the core component of the Linux operating system. It provides the essential functionality and interfaces for the system to interact with hardware devices.
hci_send_acl is a function in the Bluetooth subsystem of the Linux Kernel. It is responsible for sending data packets over the ACL link.
A use after free vulnerability occurs when a program attempts to access memory that has already been freed. This can lead to crashes, memory corruption, and potentially remote code execution.
An attacker could exploit this vulnerability by sending specially crafted Bluetooth packets, causing the system to access freed memory and potentially execute arbitrary code.
The impact and attack plausibility of this vulnerability have not been proven, but it is considered a security risk.
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