Vulnerability in Kernel: ASoC ops: Shift tested values in snd_soc_put_volsw() by +min
Summary
GSD-2022-1000943: ASoC: ops: Shift tested values in snd_soc_put_volsw() by +min. Affects Kernel versions >= 40f598698129b5ceaf31012f9501b775c7b6e57d, < 69f42e41256d5a234d3ae0d35fa66dc6d8171846. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities, including device drivers, process management, and memory management. The ASoC (Audio System on Chip) subsystem within the Kernel handles audio-related operations for systems with integrated audio components. One of the functions in this subsystem, snd_soc_put_volsw(), is responsible for adjusting volume levels. However, a vulnerability has been identified in this function that allows for the shifting of tested values by +min, potentially leading to unintended consequences and security risks.
Vulnerability Detail
The vulnerability in snd_soc_put_volsw() arises from the improper handling of tested values. By shifting these values by +min, an attacker could manipulate the volume adjustment process and potentially cause audio-related issues or exploit security vulnerabilities. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v4.9.305 by commit 69f42e41256d5a234d3ae0d35fa66dc6d8171846. However, it was introduced in version v4.9.300 by commit 40f598698129b5ceaf31012f9501b775c7b6e57d.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Kernel is not immediately feasible, a possible workaround is to disable the affected ASoC functionality. This can be achieved by modifying the Kernel configuration and removing support for the ASoC subsystem. However, this workaround may result in the loss of audio-related features and should only be considered as a temporary solution until the Kernel can be updated.
Conclusion
In conclusion, a vulnerability has been identified in the Kernel's ASoC subsystem, specifically in the snd_soc_put_volsw() function. This vulnerability allows for the shifting of tested values by +min, potentially leading to unintended consequences and security risks. It is crucial to update the Linux Kernel to version v4.9.305 or later to mitigate this vulnerability. If immediate updating is not possible, disabling the affected ASoC functionality can serve as a temporary workaround. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a fundamental component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software.
ASoC (Audio System on Chip) is a subsystem within the Linux Kernel that handles audio-related operations for systems with integrated audio components.
snd_soc_put_volsw() is a function in the ASoC subsystem that adjusts volume levels for audio components.
This vulnerability could lead to audio-related issues or potentially be exploited to gain unauthorized access or perform other malicious activities.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.9.305 or later.
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