Array Underflow Vulnerability in Linux Kernel's USB Type-C Implementation
Summary
CVE-2024-53203: In the Linux kernel, the following vulnerability has been resolved: usb: typec: fix potential array underflow in ucsi_ccg_sync_control() The "command" variable can be controlled by the user via debugfs. Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. 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 supports a wide range of hardware architectures and is known for its stability and performance. The kernel includes various subsystems, including USB Type-C, which facilitates connections and power delivery between devices. This vulnerability specifically affects the USB Type-C implementation, where improper handling of user-controlled variables can lead to security issues.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the USB Type-C subsystem, specifically within the function ucsi_ccg_sync_control(). The issue arises from the 'command' variable, which can be manipulated by users through debugfs. If the con_index variable is set to zero, it leads to an array underflow when attempting to access the connector array, potentially allowing unauthorized access to memory and leading to system instability or exploitation.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds provided for this vulnerability. Users are advised to monitor for updates and apply the patch as soon as it is available.
Conclusion
The CVE-2024-53203 vulnerability in the Linux kernel's USB Type-C implementation poses a significant risk due to potential array underflow issues. Users are encouraged to update their systems to the patched version to mitigate this risk. Regular monitoring for updates and utilizing tools like Vulert can help maintain security against such vulnerabilities.
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FAQ
CVE-2024-53203 is a vulnerability in the Linux kernel's USB Type-C implementation that can lead to an array underflow due to improper handling of user-controlled variables.
If exploited, this vulnerability can lead to unauthorized memory access, system instability, or potential exploitation by malicious users.
Versions of the Linux kernel prior to 6.12.3-1 in Debian 13 are affected. Users of Debian 11 and 12 should check for updates.
While there are no specific workarounds, it is crucial to monitor for updates and apply them as soon as they are available to mitigate risks.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By using the Vulert playground, you can check if your application is affected without any signup.
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