Fix error handling of scsi_host_alloc() in Kernel
Summary
GSD-2021-1000866: scsi: core: Fix error handling of scsi_host_alloc(). Affects Kernel versions < db08ce595dd64ea9859f7d088b51cbfc8e685c66. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that provides core functionality and interfaces with hardware devices. It manages the communication between software and hardware, including storage devices. One of the key functions of the Kernel is to allocate and manage SCSI hosts, which are responsible for handling SCSI commands and data transfers. However, a vulnerability has been discovered in the error handling of the scsi_host_alloc() function, which could lead to potential security issues.
Vulnerability Detail
The vulnerability lies in the error handling of the scsi_host_alloc() function in the Kernel. When an error occurs during the allocation of a SCSI host, the function fails to handle the error properly, potentially leaving the system in an inconsistent state. This could be exploited by an attacker to cause a denial-of-service (DoS) condition or potentially execute arbitrary code with elevated privileges. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround provided for this vulnerability. It is recommended to apply the fix by updating the Kernel to the latest version as mentioned in the 'how_to_fix' section.
Conclusion
In conclusion, the scsi_host_alloc() function in the Kernel has a vulnerability in its error handling, which could lead to potential security risks. It is crucial to update the Kernel to version v4.14.237 or later to address this issue. Applying the recommended fix ensures that the error handling is properly handled and mitigates the potential impact of this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The impact of this vulnerability could range from a denial-of-service (DoS) condition to potential execution of arbitrary code with elevated privileges.
You can use Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities without requiring access to the code or installation.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the recommended fix to mitigate any potential risks.
The exact attack vector and remote exploitability of this vulnerability have not been proven yet. However, it is always recommended to keep systems up to date with the latest security patches to minimize the risk of remote exploitation.
The vulnerability was discovered by an automated ID intended to aid in the discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven.
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