Fix NULL pointer dereference in udf_symlink function in Kernel
Summary
GSD-2021-1001489: udf: Fix NULL pointer dereference in udf_symlink function. Affects Kernel versions < 2f3d9ddd32a28803baa547e6274983b67d5e287c. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that acts as a bridge between hardware and software. It provides essential functionalities and services to enable the proper functioning of the system. One of its features is the udf file system, which allows the system to read and write data on optical discs. However, a vulnerability has been discovered in the udf_symlink function of the Kernel, which could lead to a NULL pointer dereference.
Vulnerability Detail
The vulnerability in the udf_symlink function of the Kernel arises from a NULL pointer dereference. This occurs when the function attempts to access or manipulate data using a pointer that points to NULL, resulting in a crash or unexpected behavior. An attacker could potentially exploit this vulnerability to cause a denial-of-service (DoS) attack or execute arbitrary code with kernel privileges. The impact and attack plausibility of this vulnerability have not yet been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in the udf_symlink function of the Kernel can be fixed by updating the Linux Kernel to version v4.4.276 or later. This will prevent the occurrence of NULL pointer dereferences and mitigate the potential risks associated with this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The udf_symlink function is a part of the udf file system in the Linux Kernel. It is responsible for creating symbolic links within the file system.
A NULL pointer dereference occurs when a program attempts to access or manipulate data using a pointer that points to NULL. This can lead to a crash or unexpected behavior.
The impact of this vulnerability could range from a denial-of-service (DoS) attack to the execution of arbitrary code with kernel privileges. However, the actual impact and attack plausibility have not yet been proven.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your manifest file, such as package-lock.json, and Vulert will analyze it in real-time.
You can find more information about this vulnerability in the GSD-2021-1001489 entry of the GSD database. The link to the source is provided in the vulnerability details section.
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