Use-after-free vulnerability in net: tw_timer_handler
Summary
GSD-2022-1000009: net: fix use-after-free in tw_timer_handler. Affects Kernel versions >= 61a7e26028b94805fd686a6dc9dbd9941f8f19b0, < 15579e1301f856ad9385d720c9267c11032a5022. 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 such as socket management, network protocols, and packet processing. The tw_timer_handler function within the net package is used for managing TCP time-wait state timers. This vulnerability affects the net package in the Linux Kernel.
Vulnerability Detail
The use-after-free vulnerability in tw_timer_handler arises when a timer is accessed after it has been freed. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service (DoS) condition. The vulnerability was introduced in version v2.6.27 of the Linux Kernel and was fixed in version v4.4.298. The specific commit that addressed this issue is 15579e1301f856ad9385d720c9267c11032a5022.
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 tw_timer_handler within the net package of the Linux Kernel can potentially lead to arbitrary code execution or a denial-of-service (DoS) condition. It is crucial to update the Linux Kernel to version v4.4.298 or later to mitigate this vulnerability. Regularly updating the kernel is recommended to ensure the application of the latest security patches. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The use-after-free vulnerability in tw_timer_handler can potentially lead to arbitrary code execution or a denial-of-service (DoS) 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 and Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, no known exploits have been disclosed for this vulnerability. However, it is crucial to apply the recommended fix to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if an attacker can establish a network connection to the affected system.
For more details about this vulnerability, including its technical aspects and the specific commits that fixed it, you can refer to the source link provided in the vulnerability details section.
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