Use-after-free vulnerability in hclgevf_send_mbx_msg in net: hns3
Summary
GSD-2021-1002697: net: hns3: fix use-after-free bug in hclgevf_send_mbx_msg. Affects Kernel versions >= d8355240cf8fb8b9e002b5c8458578435cea85c2, < 12512bc8f25b8ba9795dfbae0e9ca57ff13fd542. No fix is published. How to fix ↓
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Background
The hns3 package is a network driver for Huawei HiSilicon Network SoCs. It provides support for the HNS3 Ethernet controller. The hclgevf_send_mbx_msg function is responsible for sending mailbox messages in the HNS3 VF driver. This function is vulnerable to a use-after-free bug.
Vulnerability Detail
The use-after-free vulnerability in hclgevf_send_mbx_msg allows an attacker to manipulate freed memory, leading to potential code execution or a system crash. This vulnerability was introduced in Linux Kernel version v5.8 and fixed in version v5.10.88. The vulnerability occurs due to improper handling of mailbox messages, which can result in the use of freed memory. An attacker could exploit this vulnerability by sending specially crafted mailbox messages to a vulnerable system.
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 essential to apply the recommended fix by updating the Linux Kernel to the patched version.
Conclusion
The use-after-free vulnerability in hclgevf_send_mbx_msg in the hns3 package can lead to potential code execution or system crashes. It is crucial to update the Linux Kernel to version v5.10.88 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can potentially allow an attacker to execute arbitrary code or crash the system.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will alert you if the vulnerability is present.
At the time of this report, there is no known public exploit for this vulnerability. However, it is crucial to apply the recommended fix to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely by sending specially crafted mailbox messages to a vulnerable system.
The only known mitigation for this vulnerability is to update the Linux Kernel to the patched version.
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