Vulnerability Details CVE-2020-25853
The function CheckMic() 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_md5_hmac_veneer() or _rt_hmac_sha1_veneer(), resulting in a stack buffer over-read which can be exploited for 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 does not need to know the network's PSK.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 33.5%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
Products affected by CVE-2020-25853
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cpe:2.3:h:realtek:rtl8195a:-
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cpe:2.3:o:realtek:rtl8195a_firmware:-