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.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25856
Reference (s):
- https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/
- URL: https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/