Shift-out-of-bound Vulnerability in nvmem Package
Summary
GSD-2021-1002154: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells. Affects Kernel versions >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e, < 5d388fa01fa6eb310ac023a363a6cb216d9d8fe9. No fix is published. How to fix ↓
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Background
The nvmem package is a component of the Linux Kernel ecosystem. It provides an interface for accessing non-volatile memory devices, such as EEPROMs or flash memory, from user space. This package is responsible for managing the storage and retrieval of data in these memory devices. The vulnerability identified in the nvmem package involves a shift-out-of-bound issue, which can lead to undefined behavior and potential security risks.
Vulnerability Detail
The shift-out-of-bound vulnerability in the nvmem package occurs when byte size cells are shifted beyond their bounds. This issue was introduced in version v4.3 of the Linux Kernel by commit 69aba7948cbe53f2f1827e84e9dd0ae470a5072e and was fixed in version v5.15 by commit 5d388fa01fa6eb310ac023a363a6cb216d9d8fe9. The vulnerability can potentially be exploited by an attacker to manipulate memory and execute arbitrary code, leading to privilege escalation or denial of service. It is important to note that the impact and attack plausibility of this vulnerability have not been proven yet.
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.
Conclusion
The shift-out-of-bound vulnerability in the nvmem package can pose potential security risks if exploited. It is crucial to update to the latest version of the Linux Kernel (v5.15 or later) to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The nvmem package is a component of the Linux Kernel ecosystem that provides an interface for accessing non-volatile memory devices from user space.
The shift-out-of-bound vulnerability in the nvmem package can potentially be exploited by an attacker to manipulate memory and execute arbitrary code, leading to privilege escalation or denial of service.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it in real-time.
Yes, this vulnerability has been fixed in version v5.15 of the Linux Kernel by commit 5d388fa01fa6eb310ac023a363a6cb216d9d8fe9.
You can find more information about this vulnerability in the GSD database: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002154.json
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