Stack-based buffer overflow in Realtek products - CVE-2020-9395
Published: July 7, 2020 / Updated: February 8, 2021
Vulnerability identifier: #VU50405
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-9395
CWE-ID: CWE-121
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Realtek
Affected software:
RTL8195AM
RTL8711AM
RTL8711AF
RTL8710AF
RTL8195AM
RTL8711AM
RTL8711AF
RTL8710AF
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing a malformed EAPOL-Key packet with a long keydata buffer. A remote authenticated attacker on the local network can 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.
How to mitigate CVE-2020-9395
Install update from vendor's website.
Sources
- https://github.com/ambiot/amb1_arduino/commit/dcea55cf9775a0166805b3db845b237ecd5e74ea#diff-d06e7a87f34cc464a56799a419033014
- https://github.com/ambiot/amb1_sdk/commit/bc5173d5d4faf6829074b0f1e1b242c12b7777a3#diff-700c216fb376666eaeda0c892e8bdc09
- https://www.amebaiot.com/en/security_bulletin/
- https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered