Use-after-free vulnerability in netfilter nf_queue
Summary
GSD-2022-1000770: netfilter: nf_queue: fix possible use-after-free. Affects Kernel versions >= 271b72c7fa82c2c7a795bc16896149933110672d, < dd648bd1b33a828f62befa696b206c688da0ec43. No fix is published. How to fix ↓
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Background
The netfilter nf_queue module is a component of the Linux Kernel that allows packets to be queued for userspace processing. It provides a mechanism for userspace applications to inspect and modify network packets before they are forwarded. The nf_queue module is a critical part of the Linux networking stack and is used by various network security applications and packet filtering frameworks.
Vulnerability Detail
The use-after-free vulnerability in netfilter nf_queue allows an attacker to exploit a race condition in the packet queuing mechanism. By sending specially crafted packets, an attacker can trigger a use-after-free condition, leading to a potential memory corruption or a system crash. This vulnerability can be exploited remotely, without requiring any authentication or user interaction. The impact of this vulnerability can range from denial of service to remote code execution.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is strongly advised to apply the official fix by updating the Linux Kernel.
Conclusion
The use-after-free vulnerability in netfilter nf_queue can have serious security implications, ranging from denial of service to remote code execution. It is crucial to update the Linux Kernel to the latest version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Netfilter nf_queue is a module in the Linux Kernel that allows packets to be queued for userspace processing. It is used by various network security applications and packet filtering frameworks.
The use-after-free vulnerability in netfilter nf_queue is caused by a race condition in the packet queuing mechanism. By sending specially crafted packets, an attacker can trigger a use-after-free condition, potentially leading to memory corruption or a system crash.
The impact of this vulnerability can range from denial of service to remote code execution. An attacker can exploit this vulnerability remotely, without requiring any authentication or user interaction.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.27 or later. The fix is available in the Linux Kernel commit dd648bd1b33a828f62befa696b206c688da0ec43.
There is no known workaround for this vulnerability. It is strongly advised to apply the official fix by updating the Linux Kernel.
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