Use-after-free vulnerability in net: tw_timer_handler
Summary
GSD-2022-1000021: net: fix use-after-free in tw_timer_handler. Affects Kernel versions >= 61a7e26028b94805fd686a6dc9dbd9941f8f19b0, < a8e1944b44f94f5c5f530e434c5eaee787254566. No fix is published. How to fix ↓
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Background
The net package is a crucial component of the Linux Kernel, responsible for handling network-related operations. It provides various functionalities and protocols for networking, including TCP/IP stack implementation. The tw_timer_handler function is a part of the net package and is responsible for handling timer events related to TCP connections in the TIME_WAIT state.
Vulnerability Detail
The vulnerability identified in the net package is a use-after-free issue in the tw_timer_handler function. This vulnerability occurs when the function attempts to access memory that has already been freed. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service (DoS) condition. 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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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The use-after-free vulnerability in the net package's tw_timer_handler function can potentially lead to arbitrary code execution or denial-of-service conditions. It is crucial to update the Linux Kernel to version v4.19.224 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The net package in the Linux Kernel is responsible for handling network-related operations and provides functionalities and protocols for networking, including TCP/IP stack implementation.
The tw_timer_handler function is a part of the net package in the Linux Kernel and is responsible for handling timer events related to TCP connections in the TIME_WAIT state.
A use-after-free vulnerability occurs when a program attempts to access memory that has already been freed. This can lead to various security issues, including arbitrary code execution or denial-of-service conditions.
The potential impacts of this vulnerability include arbitrary code execution or denial-of-service conditions. However, the actual impact and attack plausibility have not been proven yet.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.19.224 or later, which includes the necessary fix for the use-after-free issue in tw_timer_handler.
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