CVE-2020-25854
CVSS v3
8.1
HIGH
EPSS Score
1.4 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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 internal function, rt_arc4_crypt_veneer() or _AES_UnWRAP_veneer(), 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.
Technical details
- Published
- 2021-02-03
Frequently asked questions
What is CVE-2020-25854?
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 internal function, rt_arc4_crypt_veneer() or _AES_UnWRAP_veneer(), 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.
Is CVE-2020-25854 actively exploited?
Active exploitation of CVE-2020-25854 has not been confirmed. The EPSS score is 1.4%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-25854?
CVE-2020-25854 has a CVSS v3 base score of 8.1 (HIGH severity).
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