Use-after-free vulnerability in atm: iphase package
Summary
GSD-2021-1001358: atm: iphase: fix possible use-after-free in ia_module_exit(). Affects Kernel versions < c9172498d4d62c9b64e5fb37c1ee0343e65fe51b. No fix is published. How to fix ↓
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Background
The atm: iphase package is a component of the Linux Kernel, which is responsible for handling Asynchronous Transfer Mode (ATM) network interfaces. It provides the necessary functionality for ATM devices to communicate with the operating system. The package is widely used in Linux-based systems that utilize ATM technology for network connectivity.
Vulnerability Detail
The identified vulnerability in the atm: iphase package is a use-after-free issue that exists in the ia_module_exit() function. This function is called during the module exit process and is responsible for freeing resources associated with the module. However, due to a programming error, there is a possibility of accessing freed memory after it has been released. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition on a vulnerable system. The vulnerability has been addressed in the Linux Kernel version v5.4.133 through commit c9172498d4d62c9b64e5fb37c1ee0343e65fe51b.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the atm: iphase module if it is not required for their system's functionality. This can be achieved by blacklisting the module or removing it from the system entirely. However, it is important to note that this workaround may impact the functionality of ATM network interfaces if they are in use.
Conclusion
The use-after-free vulnerability in the atm: iphase package of the Linux Kernel has the potential to be exploited by attackers to execute arbitrary code or cause a denial-of-service condition. It is crucial to update the Linux Kernel to version v5.4.133 or later to mitigate this vulnerability. Alternatively, users can consider disabling or removing the atm: iphase module if it is not required for their system's functionality. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The atm: iphase package is a component of the Linux Kernel that handles Asynchronous Transfer Mode (ATM) network interfaces.
A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed. This can lead to various security issues, including the potential execution of arbitrary code.
If exploited, this vulnerability could allow an attacker to execute arbitrary code or cause a denial-of-service condition on a vulnerable system.
Yes, the vulnerability has been fixed in the Linux Kernel version v5.4.133 through commit c9172498d4d62c9b64e5fb37c1ee0343e65fe51b.
To update the Linux Kernel, you can obtain the updated kernel source code from the official Linux Kernel repository and compile it according to your system's specifications.
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