net: hso: fix NULL-deref on disconnect regression
Summary
GSD-2021-1000046: 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 functionalities. It provides various drivers and protocols for network communication. One of the drivers included in this package is 'hso', which is used for High-Speed Option (HSO) devices. These devices are typically used for wireless communication, such as mobile broadband modems. The 'hso' driver allows the Linux Kernel to communicate with these devices and manage their network connections. However, a vulnerability has been discovered in the 'hso' driver that can lead to a NULL-dereference error when disconnecting from a network.
Vulnerability Detail
The vulnerability in the 'hso' driver occurs when disconnecting from a network. Due to a programming error, a NULL-dereference can occur, leading to a system crash or potential privilege escalation. An attacker could potentially exploit this vulnerability by sending specially crafted network packets to a vulnerable system, causing it to crash or execute arbitrary code. This vulnerability was introduced in Linux Kernel version v5.10.30 and fixed in v5.10.33.
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 recommended to apply the fix by updating the Linux Kernel.
Conclusion
The 'hso' driver in the Linux Kernel is vulnerable to a NULL-dereference error when disconnecting from a network. This vulnerability can lead to system crashes or potential privilege escalation. Users are advised to update their Linux Kernel to version v5.10.33 or later to fix this vulnerability. If you have any further questions or need assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a system crash or potential privilege escalation, which could be exploited by an attacker to disrupt network connectivity or execute arbitrary code.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground 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 important to apply the fix as soon as possible to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely by sending specially crafted network packets to a vulnerable system.
At the time of this report, there is no CVE assigned to this vulnerability. However, it is always recommended to stay updated with the latest security advisories and CVEs for your software.
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