AMD recently announced that it was preparing patches for an SMM Callout Privilege Escalation vulnerability, tracked as CVE-2020-12890, that affects the System Management Mode (SMM) of the Unified Extensible Firmware Interface (UEFI).
The vulnerability was discovered by the security researcher Danny Odler, it resides in the AMD’s Mini PC could allow attackers to manipulate secure firmware and execute arbitrary code.
“AMD is aware of new research related to a potential vulnerability in AMD software technology supplied to motherboard manufacturers for use in their Unified Extensible Firmware Interface (UEFI) infrastructure and plans to complete delivery of updated versions designed to mitigate the issue by the end of June 2020.” reads the AMD’s announcement.
“The targeted attack described in the research requires privileged physical or administrative access to a system based on select AMD notebook or embedded processors. If this level of access is acquired, an attacker could potentially manipulate the AMD Generic Encapsulated Software Architecture (AGESA) to execute arbitrary code undetected by the operating system.”
The issue could be exploited by attackers only if they have privileged physical or administrative access to a system that includes one of the affected AMD notebook or embedded processors.
If these pre-conditions are met, an attacker could potentially manipulate the AMD Generic Encapsulated Software Architecture (AGESA) to execute arbitrary code without being detected by the operating system.
AMD pointed out that only certain processors released between 2016 and 2019 are affected by the vulnerability.
The chip vendor has already delivered most of the updated versions of AGESA to its partners.
AMD recommends users to kept their systems updated by installing the latest patches.
“SMM is the most privileged code that can execute on x86 CPU thus allowing to attack any low level component including Kernel and Hypervisor.” reads the analysis published by Odler.
Odler discovered three vulnerabilities in SMM, the CVE-2020–14032 flaw was addressed in early June, the remain ones are yet to be addressed.
(SecurityAffairs – hacking, chips)
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.