Stack-based buffer overflow in Realtek products - CVE-2020-25856
Published: February 3, 2021 / Updated: February 8, 2021
Vulnerability identifier: #VU50411
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-25856
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
RTL8195AM
RTL8711AM
RTL8711AF
RTL8710AF
RTL8711AM
RTL8711AF
RTL8710AF
How to mitigate CVE-2020-25856
Install updates from vendor's website.
RTL8195AM - update to 2.0.8
RTL8711AM - update to 2.0.8
RTL8711AF - update to 2.0.8
RTL8710AF - update to 2.0.8
RTL8711AM - update to 2.0.8
RTL8711AF - update to 2.0.8
RTL8710AF - update to 2.0.8