Zero-day vulnerability in X10SLL-S/-SF

Security restrictions bypass

Known malware:

TrickBoot

Vulnerability details

Advisory: SB2021030315 - Security restrictions bypass in Supermicro X10 UP-series Denlow motherboards

Vulnerable component: X10SLL-S/-SF

CVE-ID:

CVSSv3 score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Description:

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions in BIOS firmware for X10 UP-series (H3 Single Socket тАЬDenlowтАЭ) motherboard. A local user can plant malware into motherboard firmware and establish permanent persistence on the system, even if OS is reinstalled.

Note, the vulnerability is being actively exploited in the wild by the TrickBoot malware.

External links:

https://www.supermicro.com/en/support/security/Trickbot

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.