Use-after-free vulnerability in atm-nicstar
Summary
GSD-2021-1001490: atm: nicstar: Fix possible use-after-free in nicstar_cleanup(). Affects Kernel versions < 99779c9d9ffc7775da6f7fd8a7c93ac61657bed5. No fix is published. How to fix ↓
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Background
The atm-nicstar package is a component of the Linux Kernel, which is responsible for handling ATM (Asynchronous Transfer Mode) network interfaces. The package provides support for NICSTAR-based ATM cards, allowing communication over ATM networks. The vulnerability in question is a use-after-free issue that exists in the nicstar_cleanup() function of the atm-nicstar package.
Vulnerability Detail
The use-after-free vulnerability in atm-nicstar arises when the nicstar_cleanup() function is called. This function is responsible for freeing resources associated with the NICSTAR-based ATM cards during cleanup operations. However, due to a flaw in the code, there is a possibility of accessing freed memory, leading to potential security risks. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition. The vulnerability has been addressed in the Linux Kernel version v4.4.276 by commit 99779c9d9ffc7775da6f7fd8a7c93ac61657bed5.
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 use-after-free vulnerability in atm-nicstar can pose significant security risks if left unaddressed. It is crucial to update the Linux Kernel to version v4.4.276 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The use-after-free vulnerability in atm-nicstar can potentially be exploited by attackers to execute arbitrary code or cause a denial-of-service condition.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will alert you if the vulnerability is present.
Yes, the vulnerability has been fixed in the Linux Kernel version v4.4.276 by commit 99779c9d9ffc7775da6f7fd8a7c93ac61657bed5. It is recommended to update to this version or a later one to mitigate the vulnerability.
There are no known exploits for this vulnerability at the moment. However, it is important to apply the patch or update the kernel to prevent potential exploitation.
You can find more information about this vulnerability in the Open Source Vulnerability Database (OSVDB) entry with ID GSD-2021-1001490.
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