Vulnerability in Kernel: watchdog: rzg2l_wdt: Fix 32bit overflow issue
Summary
GSD-2022-1002989: watchdog: rzg2l_wdt: Fix 32bit overflow issue. Affects Kernel versions >= 2cbc5cd0b55fa2310cc557c77b0665f5e00272de, < e07b9fa0dc32b492de85528caaf9f0c605d8424f. 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. It provides essential functionality for the proper functioning of the system. The watchdog subsystem in the Kernel is responsible for monitoring the system's health and ensuring its stability. One specific component, rzg2l_wdt, is designed for the Renesas RZ/G2L SoC family. It serves as a watchdog timer driver for these devices, ensuring that the system resets if it becomes unresponsive. However, a vulnerability has been discovered in the rzg2l_wdt driver that can lead to a 32-bit overflow issue.
Vulnerability Detail
The vulnerability in the rzg2l_wdt driver is caused by a 32-bit overflow issue. When the watchdog timer is set to a large timeout value, the calculation of the timeout period can overflow, resulting in an incorrect timeout value. This can lead to unexpected system behavior, including potential system crashes or failures to reset when necessary. An attacker could potentially exploit this vulnerability to cause a denial-of-service condition or disrupt the system's normal operation. The vulnerability was introduced in Linux Kernel version v5.17 by commit 2cbc5cd0b55fa2310cc557c77b0665f5e00272de and has been fixed in version v5.17.15 by commit e07b9fa0dc32b492de85528caaf9f0c605d8424f.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to update the Kernel to the fixed version to mitigate the risk.
Conclusion
The vulnerability in the rzg2l_wdt driver of the Kernel can lead to unexpected system behavior and potential denial-of-service conditions. It is crucial to update the Kernel to version v5.17.15 or later to fix this vulnerability. Users can obtain the latest Kernel source code and compile it or wait for their Linux distribution to provide an updated Kernel package. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to unexpected system behavior, including potential system crashes or failures to reset when necessary. An attacker could potentially exploit this vulnerability to cause a denial-of-service condition or disrupt the system's normal operation.
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 Vulert will analyze it for any known vulnerabilities, including this one.
At the time of this report, there is no known public exploit for this vulnerability. However, it is still crucial to update the Kernel to the fixed version to mitigate the risk.
This vulnerability requires local access to the system to exploit. It cannot be exploited remotely over a network.
Unfortunately, there is no known workaround for this vulnerability. It is essential to update the Kernel to the fixed version as soon as possible to mitigate the risk.
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