CVE-2020-11725: Linux Kernel - snd_ctl_elem_add Vulnerability
Summary
CVE-2020-11725: snd_ctl_elem_add in sound/core/control.c in the Linux kernel through 5.6.3 has a count=info->owner line, which later affects a private_size*count multiplication for unspecified "interesting side effects." NOTE: kernel en... 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 critical component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities for various devices, including sound control. The snd_ctl_elem_add function in the sound/core/control.c file is responsible for adding sound control elements. However, a vulnerability (CVE-2020-11725) has been discovered in this function, which can lead to potential security issues.
Vulnerability Detail
The vulnerability (CVE-2020-11725) in the Linux kernel's snd_ctl_elem_add function allows for a count=info->owner line, which can result in a multiplication of private_size*count. This multiplication can have unspecified "interesting side effects" that may lead to security vulnerabilities. It is important to note that kernel engineers dispute this finding, as it may only be relevant if new callers unfamiliar with the misuse of the info->owner field are added. The existing callers, SNDRV_CTL_IOCTL_ELEM_ADD and SNDRV_CTL_IOCTL_ELEM_REPLACE, have been designed to misuse the info->owner field in a safe manner.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability. It is advised to apply the recommended fix by updating the Linux kernel to the latest version available.
Conclusion
The vulnerability (CVE-2020-11725) in the Linux kernel's snd_ctl_elem_add function can potentially lead to security vulnerabilities. It is crucial to update the Linux kernel to the latest version (5.6.4 or later) to address this issue. Regularly applying security patches and updates is essential to ensure the integrity and security of the system. For further support and assistance in vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the specific use case and system configuration. However, it has the potential to lead to security vulnerabilities and compromise the integrity and confidentiality of the affected system.
The vulnerability affects the Linux kernel, which is a core component of the Linux operating system. Therefore, all Linux distributions that utilize the affected kernel versions are potentially vulnerable.
At the time of this report, there are no known public exploits targeting this specific vulnerability. However, it is essential to apply the recommended fix to mitigate any potential risks.
The exact conditions for remote exploitation of this vulnerability are not specified. However, it is always recommended to apply security patches and updates promptly to minimize the risk of remote exploitation.
For more detailed information about this vulnerability, including technical details and potential mitigations, you can refer to the official CVE-2020-11725 entry at the Vulert vulnerability database: https://vulert.com/cve/CVE-2020-11725
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