Vulnerability in udf: NULL pointer dereference in udf_symlink function
Summary
GSD-2021-1001391: udf: Fix NULL pointer dereference in udf_symlink function. Affects Kernel versions < 3638705ecd5ad2785e996f820121c0ad15ce64b5. No fix is published. How to fix ↓
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Background
The udf package is a component of the Linux Kernel, which is responsible for supporting the Universal Disk Format (UDF) file system. UDF is commonly used for optical media such as DVDs and Blu-ray discs. The udf_symlink function within the udf package is used to create symbolic links in the UDF file system.
Vulnerability Detail
The udf_symlink function in the udf package suffers from a NULL pointer dereference vulnerability. This vulnerability could be exploited by an attacker to cause a denial-of-service (DoS) condition or potentially execute arbitrary code. By providing a specially crafted input, an attacker can trigger the NULL pointer dereference, leading to a system crash or other unexpected behavior.
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 strongly advised to apply the recommended fix by updating the Linux Kernel.
Conclusion
The NULL pointer dereference vulnerability in the udf_symlink function of the udf package can lead to a denial-of-service (DoS) condition or potential code execution. It is crucial to update the Linux Kernel to version v4.19.198 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can lead to a denial-of-service (DoS) condition or potentially allow an attacker to execute arbitrary code.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will provide real-time alerts for open-source vulnerabilities.
At the time of this report, there is no known public exploit for this vulnerability. However, it is important to apply the recommended fix to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if the affected system is accessible over a network. It is crucial to update the Linux Kernel to prevent any potential remote exploitation.
No specific prerequisites are known for exploiting this vulnerability. However, an attacker would need to have the ability to provide a specially crafted input to trigger the NULL pointer dereference.
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