mISDN: Use-after-free Vulnerability in HFC_cleanup()
Summary
UVI-2021-1001303: mISDN: fix possible use-after-free in HFC_cleanup(). Affects Kernel versions < b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d. No fix is published. How to fix ↓
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Background
mISDN is a Linux kernel subsystem that provides support for ISDN (Integrated Services Digital Network) devices. It allows communication between computers and ISDN networks. The HFC_cleanup() function in mISDN is responsible for cleaning up resources associated with the HFC (Hybrid Function Chip) device. However, a use-after-free vulnerability has been discovered in this function, which could potentially be exploited by an attacker.
Vulnerability Detail
The use-after-free vulnerability in HFC_cleanup() occurs when the function attempts to access memory that has already been freed. This can lead to various issues, including crashes, memory corruption, and potentially remote code execution. An attacker could exploit this vulnerability by manipulating the freed memory to execute arbitrary code or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The use-after-free vulnerability in HFC_cleanup() in mISDN can have serious security implications, including crashes, memory corruption, and potential remote code execution. It is recommended to update the Linux Kernel to version v5.10.51 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
mISDN is a Linux kernel subsystem that provides support for ISDN devices and allows communication between computers and ISDN networks.
HFC_cleanup() is a function in mISDN responsible for cleaning up resources associated with the HFC (Hybrid Function Chip) device.
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.
The potential impacts of this vulnerability include crashes, memory corruption, and potential remote code execution if exploited by an attacker.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
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