UAF Vulnerability in ipmi_si and ipmi_msghandler Modules of Kernel
Summary
GSD-2021-1002793: ipmi: Fix UAF when uninstall ipmi_si and ipmi_msghandler module. Affects Kernel versions >= b2cfd8ab4add53c2070367bfee2f5b738f51698d, < 992649b8b16843d27eb39ceea5f9cf85ffb50a18. 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 ipmi_si and ipmi_msghandler modules are part of the Kernel and are responsible for handling IPMI (Intelligent Platform Management Interface) messages and communication with IPMI devices. IPMI is a standardized interface used for remote management and monitoring of computer systems. These modules play a vital role in enabling IPMI functionality on Linux systems.
Vulnerability Detail
The identified vulnerability in the ipmi_si and ipmi_msghandler modules of the Kernel is a UAF (Use-After-Free) issue. When these modules are uninstalled, there is a potential for a UAF condition to occur. A UAF vulnerability arises when a program continues to use a memory region after it has been freed, leading to potential memory corruption and exploitation by attackers. In this case, the UAF vulnerability can be triggered during the uninstallation process of the ipmi_si and ipmi_msghandler modules. The impact of this vulnerability can vary depending on the specific usage of IPMI functionality in a system. However, it has the potential to allow an attacker to execute arbitrary code, escalate privileges, or cause a denial-of-service (DoS) condition.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, if updating the Kernel is not immediately feasible, it is recommended to avoid uninstalling the ipmi_si and ipmi_msghandler modules. By keeping these modules installed, the UAF vulnerability can be mitigated. However, this workaround should be considered temporary, and updating to the latest Kernel version should be prioritized for long-term security.
Conclusion
The UAF vulnerability in the ipmi_si and ipmi_msghandler modules of the Linux Kernel can pose a significant security risk, potentially allowing attackers to execute arbitrary code or escalate privileges. It is crucial to update the Kernel to the latest version, v5.4.169 or later, to address this vulnerability. If immediate updating is not possible, keeping the ipmi_si and ipmi_msghandler modules installed can serve as a temporary workaround. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a fundamental component of the Linux operating system that manages system resources, facilitates communication between software components, and ensures system stability and security.
The ipmi_si and ipmi_msghandler modules are part of the Linux Kernel and are responsible for handling IPMI messages and communication with IPMI devices. They enable IPMI functionality on Linux systems.
A UAF (Use-After-Free) vulnerability occurs when a program continues to use a memory region after it has been freed. This can lead to memory corruption and potential exploitation by attackers.
The impact of this UAF vulnerability can vary depending on the specific usage of IPMI functionality in a system. However, it has the potential to allow an attacker to execute arbitrary code, escalate privileges, or cause a denial-of-service (DoS) condition.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.4.169 or later. This update includes the necessary fix for the UAF vulnerability in the ipmi_si and ipmi_msghandler modules.
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