UAF Vulnerability in net: fddi: fix fza_probe
Summary
UVI-2021-1001151: net: fddi: fix UAF in fza_probe. Affects Kernel versions >= 61414f5ec9834df8aa4f55c90de16b71a3d6ca8d, < bdfbb51f7a437ae8ea91317a5c133ec13adf3c47. No fix is published. How to fix ↓
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Background
The net package in the Linux Kernel is responsible for handling network protocols and providing networking functionality. The fddi module within the net package specifically deals with the Fiber Distributed Data Interface (FDDI) protocol. FDDI is a standard for transmitting data on optical fiber networks. The fza_probe function within the fddi module is vulnerable to a Use-After-Free (UAF) issue.
Vulnerability Detail
The UAF vulnerability in fza_probe arises from improper handling of certain operations, leading to a situation where memory is accessed after it has been freed. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service (DoS) condition. The vulnerability was introduced in Linux Kernel version 4.20 and has been fixed in version 5.13.5.
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 UAF vulnerability in the fza_probe function of the fddi module in the net package of the Linux Kernel can be mitigated by updating to version 5.13.5 or later. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
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FAQ
The net package is responsible for handling network protocols and providing networking functionality in the Linux Kernel.
The fddi module within the net package deals with the Fiber Distributed Data Interface (FDDI) protocol, which is used for transmitting data on optical fiber networks.
A Use-After-Free (UAF) vulnerability occurs when a program continues to use a memory reference after it has been freed, leading to potential security issues.
The UAF vulnerability in fza_probe could allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition.
To fix this vulnerability, it is recommended to update the Linux Kernel to version 5.13.5 or later.
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