Vulnerability identifier: #VU50411

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25856

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
RTL8195AM
Hardware solutions / Firmware
RTL8711AM
Hardware solutions / Firmware
RTL8711AF
Hardware solutions / Firmware
RTL8710AF
Hardware solutions / Firmware

Vendor:

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to the "DecWPA2KeyData()" function does not validate the size parameter for an "rtl_memcpy()" operation. A remote unauthenticated attacker can inject a specially crafted packet to the WPA2 handshake, trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.