Use After Free Vulnerability in ethernet:enic Package
Summary
GSD-2021-1000449: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit. Affects Kernel versions >= fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3, < 25a87b1f566b5eb2af2857a928f0e2310d900976. No fix is published. How to fix ↓
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Background
The ethernet:enic package is a component of the Linux Kernel, which is responsible for managing Ethernet network interfaces. It provides the necessary functionality for transmitting and receiving network packets. The enic_hard_start_xmit function in this package is used to initiate the transmission of Ethernet packets. However, a use after free vulnerability has been discovered in this function.
Vulnerability Detail
The use after free vulnerability in enic_hard_start_xmit arises from improper memory management. When a network packet is being transmitted, the function does not correctly handle the deallocation of memory, leading to a situation where the memory is accessed after it has been freed. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial of service by manipulating the freed memory. The vulnerability was introduced in version v4.16 of the Linux Kernel and has been fixed in version v4.19.191.
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 patch provided in the updated version of the Linux Kernel to mitigate the risk.
Conclusion
The use after free vulnerability in the ethernet:enic package of the Linux Kernel can potentially allow an attacker to execute arbitrary code or cause a denial of service. It is crucial to update the Linux Kernel to version v4.19.191 or later to fix this vulnerability. No known workaround exists, and it is recommended to apply the provided patch to ensure proper memory management during packet transmission. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The use after free vulnerability in ethernet:enic can potentially allow an attacker to execute arbitrary code or cause a denial of service by manipulating freed memory.
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, and Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there is no known public exploit for this vulnerability. However, it is crucial to apply the patch to prevent any potential exploitation.
No, there is no known workaround for this vulnerability. It is necessary to update the Linux Kernel to the fixed version to mitigate the risk.
You can find more details about this vulnerability in the Open Source Vulnerability Database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000449.json
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