CVE-2020-25856: Buffer Overflow
First published: Wed Feb 03 2021(Updated: )
The function DecWPA2KeyData() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for an rtl_memcpy() operation, resulting in a stack buffer overflow which can be exploited for remote code execution or denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker needs to know the network's PSK in order to exploit this.
Credit: vuln@vdoo.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Realtek Rtl8195a Firmware | <2.08 | |
| Realtek RTL8195A |
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Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2020-25856.
What is the severity of CVE-2020-25856?
The severity of CVE-2020-25856 is high, with a severity value of 8.1.
What is the affected software for CVE-2020-25856?
The affected software for CVE-2020-25856 is Realtek Rtl8195a Firmware version up to and excluding 2.08.
What is the impact of CVE-2020-25856?
CVE-2020-25856 can be exploited for remote code execution or denial of service.
Are there any known solutions or fixes for CVE-2020-25856?
The Realtek RTL8195A Wi-Fi Module versions released in April 2020 (2.08 and above) address the stack buffer overflow vulnerability, so updating to these versions is recommended.
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