CVE-2020-25856: Buffer Overflow
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 rtlmemcpy() 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.
Affected Software
Event History
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.