Vulnerability in RDMA/cma: Do not change route.addr.src_addr.ss_family in Kernel
Summary
GSD-2021-1001652: RDMA/cma: Do not change route.addr.src_addr.ss_family. Affects Kernel versions >= 732d41c545bb359cbb8c94698bdc1f8bcf82279c, < 0a16c9751e0f1de96f08643216cf1f19e8a5a787. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities and services to enable the proper functioning of the system. RDMA (Remote Direct Memory Access) is a technology that allows direct memory access from the memory of one computer to the memory of another computer without involving the operating system. RDMA/cma (RDMA Connection Manager) is a component of the Kernel that manages RDMA connections. It is responsible for establishing and maintaining connections between RDMA devices. The vulnerability in RDMA/cma arises from a change in the route.addr.src_addr.ss_family field, which can have unintended consequences and potential security implications.
Vulnerability Detail
The vulnerability in RDMA/cma occurs when the route.addr.src_addr.ss_family field is modified. This modification can lead to unexpected behavior and potential security risks. The exact impact and plausibility of an attack are yet to be proven. The vulnerability was introduced in version v5.10 of the Linux Kernel by commit 732d41c545bb359cbb8c94698bdc1f8bcf82279c and has been fixed in version v5.10.71 by commit 0a16c9751e0f1de96f08643216cf1f19e8a5a787. It is important to update to the fixed 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.
Conclusion
The vulnerability in RDMA/cma, which involves the modification of the route.addr.src_addr.ss_family field, can lead to unexpected behavior and potential security risks. It is crucial to update the Linux Kernel to version v5.10.71 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The exact impact of this vulnerability is yet to be proven. However, it has the potential to lead to unexpected behavior and security risks in the RDMA/cma component of the Linux Kernel.
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.
As of now, there is no known exploit for this vulnerability. However, it is important to update to the fixed version of the Linux Kernel to mitigate any potential risks.
There is no specific temporary measure mentioned for this vulnerability. It is recommended to update the Kernel to the fixed version as soon as possible.
You can refer to the vulnerability details in the GSD database: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001652.json
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