Critical Access Control Vulnerability in Linux Kernel - CVE-2022-49250
Summary
CVE-2022-49250: In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: rx-macro: fix accessing compander for aux AUX interpolator does not have compander, so check before accessing compander data for this. Affects linux versions < 5.17.3-1. Fixed in 5.17.3-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware management and system resources. It supports a wide range of functionalities, including process management, memory management, and device control. This vulnerability specifically affects the Advanced Sound Architecture (ASoC) subsystem, which is responsible for handling audio devices. The vulnerability arises from improper access checks when dealing with compander data in the AUX interpolator, potentially leading to out-of-bounds memory access.
Vulnerability Detail
CVE-2022-49250 is a vulnerability in the Linux kernel's ASoC codecs, specifically related to the rx-macro component. The issue occurs because the AUX interpolator does not have a compander, yet the code attempts to access compander data without verifying its existence. This oversight can lead to out-of-bounds access in the comp_enabled[] array, which may result in undefined behavior, crashes, or potential exploitation by malicious actors. The vulnerability was introduced in earlier versions of the Linux kernel and has been fixed in version 5.17.3-1.
How To Fix
Minimum fixed version
5.17.3-1
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 recommended action is to update to the fixed version as soon as possible.
Conclusion
CVE-2022-49250 is a critical vulnerability in the Linux kernel that poses significant risks due to improper access checks in the ASoC subsystem. Users are strongly encouraged to update their systems to the patched version to mitigate potential threats. Utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.
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FAQ
CVE-2022-49250 is a vulnerability in the Linux kernel that allows for out-of-bounds memory access due to improper checks when accessing compander data in the ASoC subsystem.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By simply using a manifest file like package-lock.json, you can check if your application is affected without any installation.
The vulnerability can lead to crashes, undefined behavior, or exploitation by attackers, potentially compromising system integrity and security.
Yes, a patch is available in version 5.17.3-1 of the Linux kernel. Users are advised to update to this version or later.
More information can be found on the official CVE database or by visiting the Vulert website, which provides real-time monitoring for open-source vulnerabilities.
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