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.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/	Exploit Third Party Advisory
https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:realtek:rtl8195a_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:realtek:rtl8195a:-:*:*:*:*:*:*:*

History

21 Nov 2024, 05:18

Type	Values Removed	Values Added
References	~~() https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/ - Exploit, Third Party Advisory~~	() https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/ - Exploit, Third Party Advisory

Information

Published : 2021-02-03 17:15

Updated : 2024-11-21 05:18

NVD link : CVE-2020-25853

Mitre link : CVE-2020-25853

CVE.ORG link : CVE-2020-25853

JSON object : View

Products Affected

realtek

rtl8195a
rtl8195a_firmware

CWE

CWE-126

Buffer Over-read

CWE-125

Out-of-bounds Read

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