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.
Advisories
Source ID Title
EUVD EUVD EUVD-2020-18486 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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: VDOO

Published:

Updated: 2024-08-04T15:49:05.426Z

Reserved: 2020-09-23T00:00:00

Link: CVE-2020-25853

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-02-03T17:15:14.187

Modified: 2024-11-21T05:18:54.377

Link: CVE-2020-25853

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.