CVE-2022-26873 : Security Advisory and Response
Learn about CVE-2022-26873, a vulnerability in PlatformInitAdvancedPreMem allowing arbitrary code execution during the PEI phase. Find out the impact, affected systems, and mitigation steps.
A potential attacker can execute an arbitrary code at the time of the PEI phase and influence the subsequent boot stages. This can lead to the mitigations bypassing, physical memory contents disclosure, discovery of any secrets from any Virtual Machines (VMs) and bypassing memory isolation and confidential computing boundaries. This vulnerability affects AMI Aptio 5.x versions.
Understanding CVE-2022-26873
This CVE involves a stack buffer overflow vulnerability in PlatformInitAdvancedPreMem that enables arbitrary code execution during the PEI phase.
What is CVE-2022-26873?
The CVE-2022-26873 vulnerability allows attackers to execute arbitrary code during the Pre-EFI Initialization (PEI) phase, potentially compromising system security and exposing sensitive information.
The Impact of CVE-2022-26873
The impact of this vulnerability includes the ability for an attacker to bypass mitigations, disclose physical memory contents, discover VM secrets, and bypass memory isolation and confidential computing boundaries.
Technical Details of CVE-2022-26873
Vulnerability Description
The vulnerability arises due to a stack-based buffer overflow in PlatformInitAdvancedPreMem, enabling an attacker to inject and execute arbitrary code during the PEI phase.
Affected Systems and Versions
AMI Aptio 5.x is confirmed to be affected by this vulnerability.
Exploitation Mechanism
By exploiting the stack buffer overflow in PlatformInitAdvancedPreMem, an attacker can execute malicious code during the PEI phase, potentially leading to system compromise.
Mitigation and Prevention
Immediate Steps to Take
Users and administrators are advised to apply the latest security patches and updates provided by the vendor to mitigate the risk of exploitation.
Long-Term Security Practices
Implementing secure coding practices and regular security audits can help prevent similar vulnerabilities in the future.
Patching and Updates
Ensure timely installation of security updates and patches released by the vendor to address the CVE-2022-26873 vulnerability.