mtd: Require Write Permissions for Locking and Badblock IOCTLs
Summary
GSD-2021-1000459: mtd: require write permissions for locking and badblock ioctls. Affects Kernel versions >= ab1a602a9cea98aa37b2e6851b168d2a2633a58d, < 75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37. No fix is published. How to fix ↓
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Background
The mtd package is a component of the Linux Kernel that provides support for Memory Technology Devices (MTDs). MTDs are a type of flash memory commonly used in embedded systems. The mtd package allows for the management and control of MTD devices, including operations such as locking and handling bad blocks. These operations are critical for ensuring the integrity and reliability of the flash memory.
Vulnerability Detail
The vulnerability identified in the mtd package allows for unauthorized access to locking and badblock IOCTLs (Input/Output Control) without requiring write permissions. This means that an attacker with read-only access to the MTD device can still perform locking and badblock operations, potentially leading to data corruption or denial of service. The vulnerability was introduced in version v4.19.139 of the Linux Kernel and was fixed in version v4.19.191.
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 apply the recommended fix by updating the Linux Kernel.
Conclusion
The mtd package in the Linux Kernel is vulnerable to unauthorized access to locking and badblock IOCTLs without write permissions. This vulnerability can lead to data corruption or denial of service. It is crucial to update the Linux Kernel to version v4.19.191 or later to fix the issue. No known workaround is available. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows for unauthorized access to critical operations in the mtd package, potentially leading to data corruption or denial of service.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will provide real-time alerts for open-source vulnerabilities.
At the time of this report, there is no known exploit for this vulnerability. However, it is crucial to apply the recommended fix to mitigate any potential risks.
No, this vulnerability requires local access to the MTD device. However, it is still important to address the issue to prevent any potential unauthorized access.
There are no reported incidents related to this vulnerability at the time of this report. However, it is recommended to apply the fix as a proactive measure.
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