Linux Kernel Vulnerability CVE-2023-52941: Timer Functionality Issue in ISOTP Protocol
Summary
CVE-2023-52941: In the Linux kernel, the following vulnerability has been resolved: can: isotp: split tx timer into transmission and timeout The timer for the transmission of isotp PDUs formerly had two functions: 1. Affects linux versions < 6.1.11-1. Fixed in 6.1.11-1. How to fix ↓
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Background
The Linux kernel is a core component of many operating systems, providing essential services for hardware and software interaction. It is known for its stability, performance, and extensive support for various hardware architectures. This vulnerability specifically affects the ISOTP (ISO Transport Protocol) implementation within the kernel, which is responsible for transmitting data frames in automotive and industrial applications. The vulnerability arises from the handling of timers related to the transmission of ISOTP Protocol Data Units (PDUs), which can lead to unexpected behavior and system instability.
Vulnerability Detail
In the Linux kernel, the vulnerability identified as CVE-2023-52941 involves the improper handling of timers for ISOTP PDUs. Previously, a single timer function managed both the transmission of consecutive frames and the monitoring of timeouts for flow control and echo frames. This dual functionality complicated state checks and could lead to system panics during testing. The issue was discovered by syzbot, which highlighted the need for clearer state transitions. The vulnerability has been resolved by splitting the timer function into two separate callbacks, enhancing clarity and reliability.
How To Fix
Minimum fixed version
6.1.11-1
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 mentioned for this vulnerability. The best course of action is to apply the patch as soon as it is available.
Conclusion
CVE-2023-52941 is a significant vulnerability in the Linux kernel affecting ISOTP protocol timer handling. It is crucial for users to update their systems to the patched version to ensure stability and security. Utilizing tools like Vulert can help in monitoring for such vulnerabilities effectively.
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FAQ
CVE-2023-52941 is a vulnerability in the Linux kernel related to the ISOTP protocol's timer handling, which can lead to system instability.
This vulnerability can cause unexpected behavior and potential system panics, especially during the transmission of ISOTP PDUs.
Yes, a patch is available in version 6.1.11-1 of the Linux kernel. Users should update to this version to mitigate the vulnerability.
You can use tools like Vulert to monitor and alert for open-source vulnerabilities in your software. Check your application against the vulnerability using the Vulert playground.
Vulert is a tool that monitors open-source vulnerabilities in software using a manifest file like package-lock.json, providing real-time alerts without requiring code access.
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