Permission check bug in net/nfc/rawsock.c
Summary
GSD-2021-1000835: net/nfc/rawsock.c: fix a permission check bug. Affects Kernel versions < d6a21a3fb03300fbaa9fc3ed99f8b0962ce28362. No fix is published. How to fix ↓
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Background
The Linux Kernel is an open-source monolithic Unix-like computer operating system kernel. It provides the essential services to enable the execution of software on a computer. The net/nfc/rawsock.c file in the Kernel is responsible for handling raw socket operations for Near Field Communication (NFC) devices. NFC is a set of communication protocols that enable two electronic devices, one of which is usually a portable device such as a smartphone, to establish communication by bringing them within a few centimeters of each other. This vulnerability in net/nfc/rawsock.c allows for a permission check bypass, potentially leading to unauthorized access or privilege escalation.
Vulnerability Detail
The vulnerability in net/nfc/rawsock.c is due to a permission check bug. The code fails to properly validate permissions, allowing an attacker to bypass the intended access restrictions. This could enable an unauthorized user to perform privileged operations or gain elevated privileges. The impact of this vulnerability depends on the specific actions that can be performed through the bypassed permission check. It is important to note that the actual impact and attack plausibility have not been proven yet.
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 permission check bug in net/nfc/rawsock.c of the Linux Kernel can potentially lead to unauthorized access or privilege escalation. It is recommended to update the Kernel to version v4.9.273 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability depends on the specific actions that can be performed through the bypassed permission check. It could potentially lead to unauthorized access or privilege escalation.
You can use Vulert Playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
Yes, a patch is available in the Linux Kernel version v4.9.273. It is recommended to update to this version or later to fix the vulnerability.
At the time of this report, there are no known exploits for this vulnerability. However, it is important to apply the recommended fix to mitigate the risk.
You can find more information about this vulnerability in the GSD-2021-1000835 JSON report available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000835.json
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