Vulnerability in Kernel: scsi: iscsi: Fix conn use after free during resets
Summary
GSD-2021-1001200: scsi: iscsi: Fix conn use after free during resets. Affects Kernel versions < fa9542b35ceb4202e8f8d65f440529a63524dca9. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides essential functionality and interfaces between hardware and software. It manages system resources, facilitates communication between processes, and ensures the stability and security of the system. The scsi (Small Computer System Interface) subsystem within the Kernel enables communication with storage devices, including iSCSI (Internet Small Computer System Interface) devices. iSCSI is a protocol that allows SCSI commands to be sent over IP networks.
The vulnerability identified in the scsi: iscsi component of the Kernel involves a use-after-free issue during resets. This vulnerability could potentially be exploited by an attacker to execute arbitrary code or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet.
Vulnerability Detail
The vulnerability in the scsi: iscsi component of the Kernel arises from a use-after-free issue that occurs during resets. When a reset operation is performed on an iSCSI connection, there is a possibility of a race condition where the connection object is freed while still being accessed. This can lead to a use-after-free scenario, where an attacker may be able to manipulate the freed memory and potentially execute arbitrary code or cause a system crash.
The vulnerability has been addressed in the Linux Kernel version v5.13.4 by commit fa9542b35ceb4202e8f8d65f440529a63524dca9. It is recommended to update to this version or a later version to mitigate the vulnerability.
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. The recommended approach is to apply the fix by updating the Linux Kernel to the patched version.
Conclusion
The vulnerability in the scsi: iscsi component of the Kernel, which involves a use-after-free issue during resets, has been identified and addressed in the Linux Kernel version v5.13.4. It is crucial to update the Kernel to this version or a later version to mitigate the vulnerability. If you require further support or assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven. However, if successfully exploited, it could allow an attacker to execute arbitrary code or cause a denial-of-service condition.
You can use tools like Vulert (https://vulert.com) to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
If you cannot immediately update the Kernel, it is recommended to implement other security measures such as network segmentation, access controls, and monitoring to reduce the risk of exploitation.
You can refer to the Linux Kernel repository on Git for more information about the fix and the vulnerability. The specific commit fa9542b35ceb4202e8f8d65f440529a63524dca9 addresses this vulnerability.
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