Use-after-free vulnerability in net/nfc package
Summary
GSD-2021-1000490: net/nfc: fix use-after-free llcp_sock_bind/connect. Affects Kernel versions >= a1cdd18c49d23ec38097ac2c5b0d761146fc0109, < 26157c82ba756767b2bd66d28a71b1bc454447f6. No fix is published. How to fix ↓
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Background
The net/nfc package is a part of the Linux Kernel ecosystem and is responsible for handling Near Field Communication (NFC) functionality. NFC enables communication between devices in close proximity, allowing for contactless data transfer. The package provides various features and protocols for NFC communication, including the Logical Link Control Protocol (LLCP).
Vulnerability Detail
The use-after-free vulnerability in the net/nfc package specifically affects the llcp_sock_bind/connect functions. This vulnerability allows an attacker to exploit a freed memory region, potentially leading to arbitrary code execution or a system crash. The vulnerability was introduced in Linux Kernel version v4.4.267 by commit a1cdd18c49d23ec38097ac2c5b0d761146fc0109 and is fixed in version v4.4.269 by commit 26157c82ba756767b2bd66d28a71b1bc454447f6.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is crucial to apply the fix by updating the Linux Kernel to the recommended version.
Conclusion
The use-after-free vulnerability in the net/nfc package's llcp_sock_bind/connect functions can lead to arbitrary code execution or system crashes. It is crucial to update the Linux Kernel to version v4.4.269 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The net/nfc package is a component of the Linux Kernel that provides functionality for Near Field Communication (NFC) communication between devices.
This vulnerability can be exploited by an attacker to execute arbitrary code or crash the system.
To fix this vulnerability, update the Linux Kernel to version v4.4.269 or later.
No, there is no known workaround for this vulnerability.
You can find more information about this vulnerability in the official Linux Kernel repository and the vulnerability database maintained by the Cloud Security Alliance.
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