netrom: Decrease sock refcount when sock timers expire
Summary
UVI-2021-1001367: netrom: Decrease sock refcount when sock timers expire. Affects Kernel versions >= 2c6b572458a9127e8070df13fa7f115c29ab1d92, < 9619cc7d97c3aa8ed3cfd2b8678b74fb6d6c7950. No fix is published. How to fix ↓
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Background
The netrom package is a part of the Linux Kernel ecosystem. It provides support for the NET/ROM protocol, which is used for amateur packet radio networking. The package includes various functionalities and features for handling network sockets and timers. However, a vulnerability has been discovered in the package that can lead to a reference count leak when sock timers expire.
Vulnerability Detail
The vulnerability in netrom arises from a failure to decrease the reference count of a socket when its timers expire. This can result in a reference count leak, leading to resource exhaustion and potential denial-of-service (DoS) attacks. An attacker could exploit this vulnerability by repeatedly triggering the expiration of sock timers, causing the reference count to increase and eventually exhausting system resources. 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 provided for this vulnerability.
Conclusion
The netrom package in the Linux Kernel is vulnerable to a reference count leak when sock timers expire. This can lead to resource exhaustion and potential denial-of-service attacks. It is recommended to update the Linux Kernel to version v4.19.199 or later to fix this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The netrom package is a part of the Linux Kernel ecosystem and provides support for the NET/ROM protocol used in amateur packet radio networking.
The vulnerability can lead to a reference count leak, resulting in resource exhaustion and potential denial-of-service attacks.
To fix the vulnerability, update your Linux Kernel to version v4.19.199 or later.
No specific workaround has been provided for this vulnerability.
For more details, you can refer to the vulnerability report at Vulert: Vulert Scanner
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