Use-after-free vulnerability in sc520_wdt in Kernel
Summary
GSD-2021-1001479: watchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff(). Affects Kernel versions < 0015581a79bbf8e521f85dddb7d3e4a66b9f51d4. No fix is published. How to fix ↓
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Background
The Kernel is a critical 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. The watchdog timer is used to monitor the system and reset it if it becomes unresponsive. However, a use-after-free vulnerability has been discovered in the wdt_turnoff() function of the sc520_wdt module.
Vulnerability Detail
The use-after-free vulnerability in the wdt_turnoff() function of the sc520_wdt module allows an attacker to potentially exploit a freed memory region. By manipulating the freed memory, an attacker could execute arbitrary code or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability has been fixed in Linux Kernel version v4.4.276 by commit 0015581a79bbf8e521f85dddb7d3e4a66b9f51d4.
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 potentially lead to arbitrary code execution or denial-of-service. It is recommended to update the Linux Kernel to version v4.4.276 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it could potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition.
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 the Vulert Playground will analyze it for any known vulnerabilities.
Yes, a patch is available in Linux Kernel version v4.4.276. It is recommended to update to this version or later to fix the vulnerability.
There are no known exploits for this vulnerability at the moment.
You can find more information about this vulnerability in the GSD-2021-1001479.json file in the GSD database (https://github.com/cloudsecurityalliance/gsd-database).
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