Vulnerability in dm verity: fix require_signatures module_param permissions
Summary
GSD-2021-1000890: dm verity: fix require_signatures module_param permissions. Affects Kernel versions < ece8ad75e31856f429b90cba30c8c6ff6a82e0dd. No fix is published. How to fix ↓
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Background
The dm verity package is a component of the Linux Kernel ecosystem. It provides integrity checking for block devices, ensuring that data has not been tampered with. The require_signatures module_param in dm verity is responsible for enforcing signature verification on verity metadata blocks. However, there is a vulnerability in the module_param permissions, which can potentially lead to unauthorized access and bypassing of signature verification.
Vulnerability Detail
The vulnerability in dm verity's require_signatures module_param permissions allows an attacker to manipulate the signature verification process. By exploiting this vulnerability, an attacker could bypass the signature check and modify verity metadata blocks, potentially leading to data integrity issues and unauthorized access to sensitive information. This vulnerability has been fixed in Linux Kernel version v5.4.126 by commit ece8ad75e31856f429b90cba30c8c6ff6a82e0dd.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The vulnerability in dm verity's require_signatures module_param permissions can be mitigated by updating the Linux Kernel to version v5.4.126 or later. Regularly updating the Kernel is crucial to ensure the latest security patches are applied. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
dm verity is a component of the Linux Kernel that provides integrity checking for block devices, ensuring data integrity and preventing tampering.
The require_signatures module_param in dm verity is responsible for enforcing signature verification on verity metadata blocks, ensuring their authenticity.
This vulnerability allows an attacker to bypass signature verification in dm verity, potentially leading to unauthorized access and data integrity issues.
Yes, this vulnerability has been fixed in Linux Kernel version v5.4.126 by commit ece8ad75e31856f429b90cba30c8c6ff6a82e0dd.
To protect your system, it is recommended to update the Linux Kernel to version v5.4.126 or later.
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