Vulnerability in ASoC: ops: Reject out of bounds values in snd_soc_put_volsw()
Summary
GSD-2022-1000109: ASoC: ops: Reject out of bounds values in snd_soc_put_volsw(). Affects Kernel versions < 586ef863c94354a7e00e5ae5ef01443d1dc99bc7. No fix is published. How to fix ↓
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Background
The ASoC (Audio System on Chip) is a subsystem in the Linux Kernel that provides support for audio devices on various embedded systems. It allows for the configuration and control of audio-related operations. One of the functions in ASoC, snd_soc_put_volsw(), is responsible for handling volume switch controls. However, this function is vulnerable to out-of-bounds values, which can lead to potential security issues.
Vulnerability Detail
The vulnerability in snd_soc_put_volsw() arises from the lack of proper validation for input values. Attackers can exploit this by providing malicious input that exceeds the expected bounds, potentially causing buffer overflows or other memory-related vulnerabilities. The impact of this vulnerability can range from denial of service (DoS) attacks to arbitrary code execution, depending on the specific context in which the function is used.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, developers can manually validate the input values in the snd_soc_put_volsw() function to ensure they fall within the expected bounds. Here is an example of how this validation can be implemented in C code:
static int snd_soc_put_volsw(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
// Validate input values
if (ucontrol->value.integer.value[0] < MIN_VALUE || ucontrol->value.integer.value[0] > MAX_VALUE) {
return -EINVAL;
}
// Rest of the function implementation
...
}
Conclusion
In conclusion, the vulnerability in ASoC's snd_soc_put_volsw() function can lead to potential security issues due to the lack of proper validation for input values. To mitigate this vulnerability, it is crucial to update the Linux Kernel to version v4.14.265 or later. Additionally, developers can implement a temporary workaround by manually validating input values. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
ASoC (Audio System on Chip) is a subsystem in the Linux Kernel that provides support for audio devices on embedded systems. It allows for the configuration and control of audio-related operations.
snd_soc_put_volsw() is a function in ASoC that handles volume switch controls. It is used to set the volume level for audio devices.
The impact of this vulnerability can range from denial of service (DoS) attacks to arbitrary code execution, depending on the specific context in which the vulnerable function is used.
To fix this vulnerability, update the Linux Kernel to version v4.14.265 or later, which includes the necessary fix for the snd_soc_put_volsw() function.
Yes, as a temporary workaround, developers can manually validate the input values in the snd_soc_put_volsw() function to ensure they fall within the expected bounds. Refer to the 'workaround' section for an example implementation.
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