net: hso: fix NULL-deref on disconnect regression
Summary
GSD-2021-1000166: net: hso: fix NULL-deref on disconnect regression. Affects Kernel versions >= dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac, < 90642ee9eb581a13569b1c0bd57e85d962215273. No fix is published. How to fix ↓
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Background
The net package in the Linux Kernel is responsible for handling network-related functionality. It includes various drivers and protocols for network communication. One of these drivers is hso, which is used for High-Speed Option (HSO) devices. These devices are typically used for mobile broadband connections. The hso driver allows the kernel to communicate with these devices and manage their network connections.
Vulnerability Detail
The vulnerability in the hso driver is a NULL-dereference issue that occurs during the disconnect process. When a network connection is terminated, the driver fails to handle a NULL pointer correctly, leading to a crash or potential privilege escalation. An attacker could potentially exploit this vulnerability to execute arbitrary code or crash the 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. Users are advised to update their kernel to the fixed version as soon as possible.
Conclusion
The hso driver in the Linux Kernel is vulnerable to a NULL-dereference issue during the disconnect process. This vulnerability could allow an attacker to execute arbitrary code or crash the system. It is recommended to update the kernel to version v5.10.33 or later to fix the issue. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The vulnerability could allow an attacker to execute arbitrary code or crash the system, potentially leading to a privilege escalation.
You can use Vulert's 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 known vulnerabilities.
At the time of this report, there are no known public exploits for this vulnerability. However, it is still important to update your kernel to the fixed version to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if the attacker can establish a network connection to the affected system.
For more details about this vulnerability, you can refer to the vulnerability report in the GSD database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000166.json
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