CVE-2019-6496 Information

Description

The ThreadX-based firmware on Marvell Avastar Wi-Fi devices models 88W8787 88W8797 88W8801 88W8897 and 88W8997 allows remote attackers to execute arbitrary code or cause a denial of service (block pool overflow) via malformed Wi-Fi packets during identification of available Wi-Fi networks. Exploitation of the Wi-Fi device can lead to exploitation of the host application processor in some cases but this depends on several factors including host OS hardening and the availability of DMA.

CVSS Vector

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.securityfocus.com/bid/106865 https://2018.zeronights.ru/wp-content/uploads/materials/19-Researching-Marvell-Avastar-Wi-Fi.pdf https://embedi.org/blog/remotely-compromise-devices-by-using-bugs-in-marvell-avastar-wi-fi-from-zero-knowledge-to-zero-click-rce/ https://www.kb.cert.org/vuls/id/730261/ https://www.scribd.com/document/398350818/WiFi-CVE-2019-6496-Marvell-s-Statement https://www.synology.com/security/advisory/Synology_SA_19_07 https://www.zdnet.com/article/wifi-firmware-bug-affects-laptops-smartphones-routers-gaming-devices/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8