Vulnerability in Kernel: ts4800_wdt
Summary
GSD-2022-1003720: watchdog: ts4800_wdt: Fix refcount leak in ts4800_wdt_probe. Affects Kernel versions >= bf9006399939762e6cd32445e848e56727df9d98, < 5b110d940417942bc87d9e4bea6d4f24e05ed483. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionality and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The ts4800_wdt module is a watchdog driver specific to the TS-4800 board, which is responsible for monitoring system health and triggering a system reset if necessary.
Vulnerability Detail
The ts4800_wdt module in the Kernel suffers from a refcount leak vulnerability in the ts4800_wdt_probe function. This vulnerability was introduced in version v4.5 of the Kernel and fixed in version v5.4.198. An attacker could potentially exploit this vulnerability to cause a denial-of-service (DoS) condition or execute arbitrary code with elevated privileges. The vulnerability arises due to improper handling of reference counts, leading to a resource leak.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can disable the ts4800_wdt module by blacklisting it. This can be achieved by adding the following line to the '/etc/modprobe.d/blacklist.conf' file:
blacklist ts4800_wdt
After making this change, a system reboot is required for the changes to take effect. However, it is strongly recommended to apply the official fix by updating the Kernel to a patched version.
Conclusion
The ts4800_wdt module in the Kernel suffers from a refcount leak vulnerability, which could potentially lead to a denial-of-service (DoS) condition or arbitrary code execution. It is crucial to update the Kernel to version v5.4.198 or later to mitigate this vulnerability. Alternatively, users can apply a temporary workaround by blacklisting the ts4800_wdt module. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability could potentially allow an attacker to cause a denial-of-service (DoS) condition or execute arbitrary code with elevated privileges on a system running an affected version of the Kernel.
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, including this one.
Yes, a patch for this vulnerability is available in version v5.4.198 of the Kernel. It is recommended to update the Kernel to this version or a later one to mitigate the vulnerability.
Yes, a temporary workaround is to disable the ts4800_wdt module by blacklisting it. However, it is strongly recommended to apply the official fix by updating the Kernel to a patched version.
There are no known instances of this vulnerability being exploited in the wild. However, it is important to apply the necessary updates or workarounds to ensure the security and stability of your system.
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