Kernel Vulnerability in Linux Package: Histogram Value Modifier Issue
Summary
CVE-2023-53093: In the Linux kernel, the following vulnerability has been resolved: tracing: Do not let histogram values have some modifiers Histogram values can not be strings, stacktraces, graphs, symbols, syscalls, or grouped in buck... 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 the core component of Linux operating systems, managing hardware resources and providing essential services for software applications. It is known for its stability, performance, and flexibility, making it a popular choice for servers, desktops, and embedded systems. This vulnerability pertains to the kernel's tracing subsystem, specifically related to histogram values that can lead to system instability.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified where histogram values can incorrectly accept certain modifiers such as strings, stacktraces, graphs, symbols, syscalls, or grouped in buckets or logs. This flaw can lead to a kernel NULL pointer dereference, resulting in a segmentation fault and potential system crashes. The issue arises from the histogram code's inability to handle these modifiers, which was not anticipated during its design.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, avoid using histogram values with unsupported modifiers in the tracing subsystem. Ensure that any modifications to histogram configurations adhere strictly to the accepted formats to prevent triggering the vulnerability.
Conclusion
The CVE-2023-53093 vulnerability in the Linux kernel poses a significant risk due to improper handling of histogram values, which can lead to system crashes. Users are advised to update their systems to the patched versions to mitigate this risk. Additionally, utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2023-53093 is a vulnerability in the Linux kernel related to improper handling of histogram values in the tracing subsystem, which can lead to system crashes.
You can use Vulert, which monitors open-source vulnerabilities in your software. By utilizing the manifest file like package-lock.json, you can check for vulnerabilities without needing to access the code.
Exploiting this vulnerability can lead to kernel crashes, resulting in system instability and potential data loss.
Yes, a patch is available in version 6.1.25-1 for Debian 12 and Debian 13. Users should update their Linux package to this version.
Regularly update your Linux package to the latest version and avoid using unsupported histogram modifiers in the tracing subsystem.
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