Use-after-free vulnerability in atm: iphase package
Summary
GSD-2021-1001304: atm: iphase: fix possible use-after-free in ia_module_exit(). Affects Kernel versions < e759ff76ebbbfcdcf83b6634c54dc47828573d8b. 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.
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 there is a possibility of accessing freed memory, leading to potential security risks. Although the impact and attack plausibility have not been proven, this vulnerability should be taken seriously as it could potentially be exploited by malicious actors to execute arbitrary code or cause system crashes.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid loading and unloading the atm: iphase module dynamically. By keeping the module loaded throughout the system's uptime, the module exit process, where the use-after-free vulnerability exists, can be bypassed. However, this is not a recommended long-term solution, as it may limit the system's flexibility and prevent the proper handling of the module.
Conclusion
The use-after-free vulnerability in the atm: iphase package of the Linux Kernel can pose significant security risks if left unaddressed. It is crucial to update the kernel to version v5.10.51 or later to apply the necessary fix. Additionally, it is recommended to follow best practices for system security and regularly update software components to ensure a robust and secure environment. 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 facilitates the communication between the operating system and 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 or system crashes.
If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code or cause system crashes, potentially leading to a complete system compromise or denial of service.
Yes, the vulnerability has been fixed in Linux Kernel version v5.10.51. It is recommended to update the kernel to this version or later to mitigate the risk.
A temporary workaround is to avoid dynamically loading and unloading the atm: iphase module. By keeping the module loaded throughout the system's uptime, the vulnerable code path can be bypassed. However, this is not a recommended long-term solution.
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