Boundary Check Vulnerability in Linux Kernel: RDMA/mana_ib Package
Summary
DEBIAN-CVE-2024-38542: In the Linux kernel, the following vulnerability has been resolved: RDMA/mana_ib: boundary check before installing cq callbacks Add a boundary check inside mana_ib_install_cq_cb to prevent index overflow. Affects linux versions < 6.8.12-1. Fixed in 6.8.12-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, responsible for managing hardware and system resources. It provides essential services for all other parts of the operating system. The RDMA (Remote Direct Memory Access) subsystem allows for high-throughput, low-latency networking, which is crucial for performance in data centers and high-performance computing environments. This vulnerability affects the mana_ib driver within the RDMA subsystem, which is responsible for managing communication between devices over the network.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the RDMA/mana_ib driver related to insufficient boundary checks before installing completion queue (CQ) callbacks. This oversight can lead to index overflow, potentially allowing an attacker to exploit the system by manipulating the completion queue, which may result in unauthorized access or system instability. The vulnerability is classified under CVE-2024-38542 and affects both Debian 13 and 14 versions of the Linux package.
How To Fix
Minimum fixed version
6.8.12-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds provided for this vulnerability. It is recommended to apply the patch as soon as it is available to mitigate any potential risks.
Conclusion
The vulnerability identified as CVE-2024-38542 in the Linux kernel's RDMA/mana_ib driver poses significant risks due to insufficient boundary checks. Users are strongly advised to update their systems to the patched version 6.8.12-1 to ensure protection against potential exploits. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.
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FAQ
CVE-2024-38542 is a vulnerability in the Linux kernel's RDMA/mana_ib driver that allows for index overflow due to insufficient boundary checks.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Check your application against this vulnerability using the Vulert playground at Vulert Scanner.
Exploitation of this vulnerability could lead to unauthorized access, system instability, or other security breaches due to the manipulation of completion queues.
Yes, a patch is available in version 6.8.12-1 of the Linux package. It is recommended to update to this version to mitigate the vulnerability.
While there are no specific workarounds, it is crucial to monitor your system for any unusual activity and apply the patch as soon as possible.
References
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