Use-after-free vulnerability in nicstar_cleanup() function in atm: nicstar package
Summary
GSD-2021-1001462: atm: nicstar: Fix possible use-after-free in nicstar_cleanup(). Affects Kernel versions < 4e2a0848ea2cab0716d46f85a8ccd5fa9a493e51. No fix is published. How to fix ↓
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Background
The atm: nicstar package is a component of the Linux Kernel, specifically designed for ATM (Asynchronous Transfer Mode) networking. It provides support for NICSTAR-based ATM cards. These cards are used to establish high-speed connections over ATM networks. The nicstar_cleanup() function is responsible for cleaning up resources allocated by the NICSTAR driver. However, a use-after-free vulnerability has been discovered in this function, which could potentially lead to security breaches.
Vulnerability Detail
The use-after-free vulnerability in nicstar_cleanup() occurs when the function attempts to access memory that has already been freed. This can result in various security issues, such as crashes, privilege escalation, or arbitrary code execution. An attacker could exploit this vulnerability by carefully manipulating the memory layout, causing the function to access freed memory and potentially executing malicious code. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The use-after-free vulnerability in the nicstar_cleanup() function of the atm: nicstar package can potentially lead to security breaches. It is recommended to update the Linux Kernel to version v4.9.276 or later to address this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The atm: nicstar package is a component of the Linux Kernel that provides support for NICSTAR-based ATM cards, enabling high-speed connections over ATM networks.
A use-after-free vulnerability occurs when a program attempts to access memory that has already been freed. This can lead to crashes, privilege escalation, or arbitrary code execution.
An attacker can exploit this vulnerability by manipulating the memory layout in a way that causes the nicstar_cleanup() function to access freed memory. This can potentially allow the execution of malicious code.
No, the impact and attack plausibility of this vulnerability have not been proven yet. Further analysis and testing are required to determine the actual risk.
To fix this vulnerability, update the Linux Kernel to version v4.9.276 or later, which includes the necessary fix for the use-after-free vulnerability in nicstar_cleanup().
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