UAF in sata_fsl_port_stop when rmmod sata_fsl
Summary
GSD-2021-1002376: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl. Affects Kernel versions >= faf0b2e5afe7dae072d2715763c7f992b612b628, < 91ba94d3f7afca195b224f77a72044fbde1389ce. No fix is published. How to fix ↓
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Background
The sata_fsl package is a component of the Linux Kernel. It provides support for SATA controllers based on the Freescale PowerPC platform. The sata_fsl_port_stop function in this package is responsible for stopping the SATA port. However, a use-after-free (UAF) vulnerability exists in this function when the sata_fsl module is unloaded using the rmmod command. This vulnerability was introduced in version v2.6.24 of the Linux Kernel and has been fixed in version v4.9.292.
Vulnerability Detail
The UAF vulnerability in sata_fsl_port_stop occurs when the sata_fsl module is unloaded. This can lead to a situation where a reference to a freed memory object is still accessible, potentially allowing an attacker to execute arbitrary code or cause a denial-of-service (DoS) 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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Conclusion
The sata_fsl package in the Linux Kernel is vulnerable to a use-after-free (UAF) issue in the sata_fsl_port_stop function. This vulnerability can potentially be exploited to execute arbitrary code or cause a denial-of-service (DoS) condition. It is advised to update the Linux Kernel to version v4.9.292 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The sata_fsl package is a component of the Linux Kernel that provides support for SATA controllers based on the Freescale PowerPC platform.
A use-after-free (UAF) vulnerability occurs when a program continues to use a memory object after it has been freed. This can lead to various security issues, including arbitrary code execution or denial-of-service (DoS) attacks.
The sata_fsl UAF vulnerability can potentially be exploited by unloading the sata_fsl module using the rmmod command. This can result in a use-after-free condition, allowing an attacker to execute arbitrary code or cause a DoS condition.
No, the impact and attack plausibility of this vulnerability have not been proven yet. Further analysis and testing may be required to determine the actual risk posed by this vulnerability.
To fix the sata_fsl UAF vulnerability, it is recommended to update the Linux Kernel to version v4.9.292 or later, which includes the necessary fix for this issue.
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