Vulnerability · Published Feb 3, 2021 · Assigned by VDOO

CVE-2020-25855

High 8.1

In plain English

A high-severity stack buffer overflow in Realtek RTL8195A Wi-Fi Module. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.8% (higher than 86% of all known vulnerabilities).

Severity (CVSS NVD)8.1High

Exploit odds (30 days)2.8%top 13.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

The function AES_UnWRAP() 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 a 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	Realtek RTL8195A Wi-Fi Module	Versions before 2020-04-21 (up to and excluding 2.08)

Weakness: CWE-121

References

https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/ x_refsource_CONFIRM