Vulnerability in Kernel package: scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc()
Summary
GSD-2021-1002603: scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc(). Affects Kernel versions >= 05c6c029a44d9f43715577e33e95eba87f44d285, < f8dccc1bdea7e21b5ec06c957aef8831c772661c. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. It includes various subsystems, including the scsi (Small Computer System Interface) subsystem, which manages SCSI devices. The pm80xx driver within the scsi subsystem is responsible for supporting the PM8001 SAS/SATA controller. This vulnerability specifically affects the pm8001_alloc() function in the pm80xx driver.
Vulnerability Detail
The vulnerability arises from an incorrect usage of the scsi_remove_host() function within the pm8001_alloc() function. Calling scsi_remove_host() in pm8001_alloc() can lead to a use-after-free scenario, potentially resulting in a system crash or other unpredictable behavior. An attacker may be able to exploit this vulnerability to execute arbitrary code or escalate privileges. The vulnerability was introduced in version v5.10 of the Linux Kernel and has been fixed in version v5.15.8.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid the vulnerability by not using the pm80xx driver or by disabling the affected functionality. However, this may result in the loss of support for the PM8001 SAS/SATA controller.
Conclusion
The vulnerability in the Kernel package's scsi: pm80xx driver can lead to a use-after-free scenario and potential system instability. It is crucial to update the Kernel package to version v5.15.8 or later to mitigate this vulnerability. Users can also utilize the Vulert Playground to check if their system is affected and receive real-time vulnerability alerts. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can potentially lead to a system crash, arbitrary code execution, or privilege escalation.
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 the tool 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 important to apply the recommended fixes to mitigate any potential risks.
Yes, you can apply the provided workaround to avoid the vulnerability. However, it is still recommended to update to the latest version of the Kernel package as soon as possible.
You can refer to the vulnerability details in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002603.json) for more information.
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