Unlimited Package Queueing Vulnerability in xen/netback
Summary
GSD-2021-1002763: xen/netback: don't queue unlimited number of packages. Affects Kernel versions >= f48da8b14d04ca87ffcffe68829afd45f926ec6a, < bd926d189210cd1d5b4e618e45898053be6b4b3b. No fix is published. How to fix ↓
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Background
The xen/netback package is a component of the Linux Kernel, which is responsible for handling network backends in Xen virtualization environments. It provides the necessary functionality to communicate between the virtual network interface of a guest domain and the physical network interface of the host system. This vulnerability affects versions of the Linux Kernel from v3.18 to v5.15.10.
Vulnerability Detail
The vulnerability in xen/netback allows an unlimited number of packages to be queued, potentially leading to resource exhaustion and denial of service. By exploiting this vulnerability, an attacker could flood the system with a large number of network packages, overwhelming the network stack and causing the system to become unresponsive. This vulnerability was introduced in Linux Kernel v3.18 and has been fixed in v5.15.11.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability at the moment.
Conclusion
The unlimited package queueing vulnerability in xen/netback can lead to resource exhaustion and denial of service. It is recommended to update the Linux Kernel to version v5.15.11 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can lead to resource exhaustion and denial of service, potentially rendering the affected system unresponsive.
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 the playground will analyze it for any known vulnerabilities.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely by sending a large number of network packages to the affected system.
There are no known reports of this vulnerability being actively exploited in the wild.
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