netfilter: ipset: Fix oversized kvmalloc() calls in Kernel
Summary
UVI-2021-1001587: netfilter: ipset: Fix oversized kvmalloc() calls. Affects Kernel versions < 6f2f68640b8478b3bd385bc541ee517d7bdddf76. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and enforces security policies. The netfilter subsystem within the Kernel is responsible for packet filtering and network address translation. It includes the ipset module, which allows the creation and management of sets of IP addresses, networks, and ports. However, a vulnerability has been identified in the ipset module that involves oversized kvmalloc() calls.
Vulnerability Detail
The vulnerability in the ipset module arises from the use of oversized kvmalloc() calls. This can lead to memory allocation failures and potential memory corruption issues. An attacker could potentially exploit this vulnerability to cause a denial-of-service (DoS) condition or execute arbitrary code with elevated privileges. The impact and attack plausibility of this vulnerability have not been proven yet, but it is crucial to address it to ensure the security and stability of the system.
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. The recommended approach is to update the Linux Kernel to the fixed version.
Conclusion
The vulnerability in the ipset module of the Kernel can lead to memory allocation failures and potential memory corruption. It is crucial to update the Linux Kernel to the fixed version to mitigate the risk of exploitation. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that provides core functionalities and interfaces with hardware devices.
The netfilter subsystem is responsible for packet filtering and network address translation in the Linux Kernel.
The ipset module is a component of the netfilter subsystem that allows the creation and management of sets of IP addresses, networks, and ports.
The impact of this vulnerability includes potential memory allocation failures, memory corruption, denial-of-service (DoS) conditions, and the possibility of arbitrary code execution with elevated privileges.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.4.151 or later, which includes the necessary fix for the oversized kvmalloc() calls in the ipset module.
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