ext4: Panic when errors=panic is specified
Summary
GSD-2021-1000101: ext4: always panic when errors=panic is specified. Affects Kernel versions >= 014c9caa29d3a44e0de695c99ef18bec3e887d52, < 64e1eebe2131183174f4fbb6b1491355f96c6cde. No fix is published. How to fix ↓
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Background
The ext4 package is a file system driver for the Linux Kernel. It provides support for the ext4 file system, which is commonly used in Linux distributions. The ext4 file system is known for its performance, scalability, and reliability. However, a vulnerability has been discovered in the ext4 driver that causes the system to panic when the 'errors=panic' option is specified.
Vulnerability Detail
The vulnerability in the ext4 driver causes the system to panic when the 'errors=panic' option is used. This option is intended to make the system panic and halt when an error occurs, ensuring data integrity. However, due to a flaw in the ext4 driver, the system panics even for non-fatal errors, leading to an unexpected system halt. This vulnerability can be exploited by an attacker to cause a denial-of-service (DoS) condition on a vulnerable system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid using the 'errors=panic' option in the ext4 file system configuration. Instead, they can use other error handling options such as 'errors=remount-ro' or 'errors=continue' to handle errors without causing a system panic.
Conclusion
The ext4 driver in the Linux Kernel is vulnerable to a flaw that causes the system to panic when the 'errors=panic' option is used. This vulnerability can be exploited by an attacker to cause a denial-of-service (DoS) condition. Users should update their Linux Kernel to version v5.11.20 or later to fix the vulnerability. As a workaround, users can avoid using the 'errors=panic' option and use alternative error handling options. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can be exploited by an attacker to cause a denial-of-service (DoS) condition on a vulnerable system, leading to an unexpected system halt.
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 open-source vulnerabilities, including this one.
Yes, the vulnerability has been fixed in Linux Kernel version v5.11.20. Users should update their Linux Kernel to version v5.11.20 or later to mitigate the vulnerability.
Yes, as a workaround, users can avoid using the 'errors=panic' option in the ext4 file system configuration. Instead, they can use other error handling options such as 'errors=remount-ro' or 'errors=continue' to handle errors without causing a system panic.
You can find more information about this vulnerability in the GSD-2021-1000101.json file available in the GSD database (https://github.com/cloudsecurityalliance/gsd-database).
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