netrom: Decrease sock refcount when sock timers expire
Summary
GSD-2021-1001468: netrom: Decrease sock refcount when sock timers expire. Affects Kernel versions >= ce29e8a259de767f7210d346ad2b031cb8ab2732, < 853262355518cd1247515b74e83fabf038aa6c29. 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 a network layer protocol used for amateur packet radio networks. The package includes functionality for handling network sockets and timers. However, a vulnerability has been identified 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 properly decrease the reference count of a socket when its timers expire. This can result in a reference count leak, potentially leading to resource exhaustion and denial of service attacks. The vulnerability was introduced in version v4.4.173 of the Linux Kernel and has been fixed in version v4.4.277. It is important to note that the actual impact and attack plausibility of this vulnerability have not been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The netrom package in the Linux Kernel is vulnerable to a reference count leak when sock timers expire. It is recommended to update the Linux Kernel to version v4.4.277 or later to fix this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
Netrom is a package in the Linux Kernel ecosystem that provides support for the NET/ROM protocol used in amateur packet radio networks.
The vulnerability can lead to a reference count leak, potentially resulting in resource exhaustion and denial of service attacks.
You can use Vulert's playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities without requiring access to the code or installation.
There is no information available regarding exploitation of this vulnerability in the wild.
You can find more information about this vulnerability in the Open Source Vulnerability Database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001468.json
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