Use-after-free vulnerability in sc520_wdt module of Kernel
Summary
UVI-2021-1001449: watchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff(). Affects Kernel versions < b4565a8a2d6bffb05bfbec11399d261ec16fe373. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that manages system resources and facilitates communication between hardware and software. The sc520_wdt module is responsible for controlling the watchdog timer on SC520-based systems. A watchdog timer is a hardware device that triggers a system reset if it detects a software or hardware failure. However, a use-after-free vulnerability has been identified in the wdt_turnoff() function of the sc520_wdt module.
Vulnerability Detail
The use-after-free vulnerability in the sc520_wdt module occurs when the wdt_turnoff() function is called. This function is responsible for turning off the watchdog timer. However, due to improper memory management, it is possible for the function to access memory that has already been freed. An attacker could potentially exploit this vulnerability 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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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The use-after-free vulnerability in the sc520_wdt module of the Kernel can be mitigated by updating the Linux Kernel to version v4.9.276 or later. It is important to stay up-to-date with security patches and fixes to ensure the stability and security of the system. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The sc520_wdt module is responsible for controlling the watchdog timer on SC520-based systems. A watchdog timer is a hardware device that triggers a system reset if it detects a software or hardware failure.
A use-after-free vulnerability occurs when a program continues to use a memory reference after it has been freed. This can lead to memory corruption and potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition.
The impact of this vulnerability is not yet proven. However, if successfully exploited, an attacker could execute arbitrary code or cause a denial-of-service condition.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.9.276 or later, which includes the necessary fix for the sc520_wdt module.
You can find more information about this vulnerability in the Linux Kernel repository and the provided source link in the Open Source Vulnerability format.
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