Use After Free Vulnerability in rtl8192e Driver
Summary
GSD-2021-1002354: staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect(). Affects Kernel versions >= 66898177e7e5486dc77a4ba742efa4e2e9e900a4, < d43aecb694b10db9a4228ce2d38b5ae8de374443. No fix is published. How to fix ↓
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Background
The rtl8192e driver is a component of the Linux Kernel, which is responsible for managing the Realtek RTL8192E wireless network adapter. This driver provides functionality for connecting to and communicating over Wi-Fi networks using the RTL8192E chipset. The vulnerability described here affects the rtl8192e driver and can lead to a use after free condition.
Vulnerability Detail
The use after free vulnerability in the _rtl92e_pci_disconnect() function of the rtl8192e driver allows an attacker to exploit a freed memory region. This can result in various consequences, including crashes, privilege escalation, or arbitrary code execution. The vulnerability was introduced in version v3.2 of the Linux Kernel and was fixed in version v4.4.294. The specific commit that addresses this issue is d43aecb694b10db9a4228ce2d38b5ae8de374443.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.4.294 or later. This can be done by obtaining the latest stable version of the Linux Kernel from the official repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and applying the necessary updates. Alternatively, users can rely on their Linux distribution's package manager to install the updated kernel package.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel to a patched version.
Conclusion
The use after free vulnerability in the rtl8192e driver can have severe consequences, including crashes, privilege escalation, or arbitrary code execution. It is crucial to update the Linux Kernel to a patched version (v4.4.294 or later) to mitigate this vulnerability. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
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FAQ
The use after free vulnerability in the rtl8192e driver can lead to crashes, privilege escalation, or arbitrary code execution. An attacker may be able to exploit this vulnerability to gain unauthorized access to a system or disrupt its normal operation.
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 Vulert will analyze it for any known vulnerabilities, including this one.
At the time of this report, there are no known public exploits specifically targeting this vulnerability. However, it is crucial to apply the fix promptly to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if the affected system is connected to a network. An attacker can send specially crafted network packets to trigger the use after free condition in the rtl8192e driver.
For more details about this vulnerability, including technical specifics and the commit that fixes it, you can refer to the vulnerability report in the GSD database: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002354.json
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