Vulnerability in Kernel: scsi: iscsi: Fix conn use after free during resets
Summary
GSD-2021-1001276: scsi: iscsi: Fix conn use after free during resets. Affects Kernel versions < 89812e7957ab0746eab66ed6fc49d52bb4dca250. 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 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 within the Kernel enables communication with storage devices, including iSCSI (Internet Small Computer System Interface) devices. iSCSI is a protocol that allows the use of SCSI commands over IP networks.
However, a vulnerability has been identified in the scsi: iscsi module of the Kernel. This vulnerability can lead to a use-after-free condition during resets of the iSCSI connection. A use-after-free vulnerability occurs when a program continues to use a memory area after it has been freed, which can result in a crash or potentially allow an attacker to execute arbitrary code or perform other malicious activities.
Vulnerability Detail
The vulnerability in the scsi: iscsi module of the Kernel arises from a use-after-free condition during resets of the iSCSI connection. When a reset is triggered, there is a possibility that the connection object (conn) is freed while still being accessed by other parts of the code. This can lead to memory corruption or use of invalid memory, potentially resulting in system crashes or exploitation by an attacker.
The impact of this vulnerability depends on the context in which it is exploited. If successfully exploited, an attacker may be able to execute arbitrary code with kernel privileges, gain unauthorized access to sensitive information, or cause denial-of-service conditions.
It is important to note that the actual impact and attack plausibility of this vulnerability have not yet been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As this vulnerability has been fixed in the Linux Kernel, there is no specific workaround available. It is strongly advised to update the Kernel to the fixed version.
Conclusion
In conclusion, a vulnerability has been identified in the scsi: iscsi module of the Kernel, which can lead to a use-after-free condition during resets of the iSCSI connection. This vulnerability has been fixed in the Linux Kernel version v5.10.52 by commit 89812e7957ab0746eab66ed6fc49d52bb4dca250. It is crucial to update the Kernel to the fixed version to ensure the security and stability of the system. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software.
scsi stands for Small Computer System Interface. It is a subsystem within the Kernel that enables communication with storage devices.
iSCSI stands for Internet Small Computer System Interface. It is a protocol that allows the use of SCSI commands over IP networks.
A use-after-free vulnerability occurs when a program continues to use a memory area after it has been freed, which can result in a crash or potentially allow an attacker to execute arbitrary code or perform other malicious activities.
The impact of this vulnerability depends on the context in which it is exploited. If successfully exploited, an attacker may be able to execute arbitrary code with kernel privileges, gain unauthorized access to sensitive information, or cause denial-of-service conditions.
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