Vulnerability in Kernel: scsi: iscsi: Fix conn use after free during resets
Summary
GSD-2021-1001383: scsi: iscsi: Fix conn use after free during resets. Affects Kernel versions < bf20d85a88384574fabb3d53ad62a8af57e7ab11. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that provides core functionalities 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 scsi (Small Computer System Interface) subsystem in the Kernel enables communication with SCSI devices, including storage devices. The iscsi (Internet Small Computer System Interface) protocol is used for accessing storage resources over IP networks. This vulnerability specifically affects the iscsi component of the scsi subsystem.
Vulnerability Detail
The vulnerability in the iscsi component of the Kernel allows for a use-after-free scenario during resets. When certain reset operations are performed, the connection (conn) object is freed but still referenced, leading to potential use-after-free issues. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition. 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 mentioned for this vulnerability.
Conclusion
The vulnerability in the iscsi component of the Kernel can be mitigated by updating the Kernel to version v4.19.198 or later. It is crucial to promptly apply the fix to prevent potential exploitation and ensure the security and stability of the system. For further support and assistance in vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability could potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition.
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 to the playground, and it will analyze and alert you in real-time if any open-source vulnerabilities, including this one, are found.
As of now, there is no known exploit for this vulnerability. However, it is important to apply the fix promptly to mitigate any potential risks.
The vulnerability is present in versions of the Kernel prior to v4.19.198. Therefore, systems running older versions may be affected.
Yes, it is recommended to reboot the system after updating the Kernel to ensure that the fix is fully applied and the system is running with the patched version.
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