CVE-2022-30772 : Vulnerability Insights and Analysis

This article discusses the details of CVE-2022-30772, a vulnerability that allows manipulation of the input address in PnpSmm function 0x52, potentially leading to the overwrite of SMRAM or OS kernel memory.

Understanding CVE-2022-30772

In CVE-2022-30772, a security vulnerability in the PnpSmm function 0x52 could be exploited by malware to overwrite SMRAM or OS kernel memory. The issue was discovered during a security review by Insyde engineering.

What is CVE-2022-30772?

CVE-2022-30772 involves the manipulation of the input address in PnpSmm function 0x52, enabling attackers to tamper with the SMBIOS table data and potentially overwrite SMRAM or OS kernel memory.

The Impact of CVE-2022-30772

The exploitation of CVE-2022-30772 could result in unauthorized access to sensitive system memory, leading to potential data breaches or system compromises.

Technical Details of CVE-2022-30772

The vulnerability description, affected systems and versions, and the exploitation mechanism are outlined below.

Vulnerability Description

Function 0x52 of the PnpSmm driver receives the address and size of data to be written into the SMBIOS table. By manipulating the input address, malware can overwrite SMRAM or OS kernel memory, posing a security risk.

Affected Systems and Versions

Vendor and product details are not applicable in this context. The following kernel versions address the vulnerability: Kernel 5.0: 05.09.41, Kernel 5.1: 05.17.43, Kernel 5.2: 05.27.30, Kernel 5.3: 05.36.30, Kernel 5.4: 05.44.30, Kernel 5.5: 05.52.30.

Exploitation Mechanism

The exploitation involves manipulating the input address in PnpSmm function 0x52 to overwrite SMRAM or OS kernel memory, potentially granting unauthorized access to critical system resources.

Mitigation and Prevention

Learn about immediate steps to take and long-term security practices to enhance protection against CVE-2022-30772.

Immediate Steps to Take

Immediately apply the provided kernel patches to mitigate the vulnerability and prevent potential exploitation by threat actors.

Long-Term Security Practices

Ensure regular security updates and patches to all system components to safeguard against similar vulnerabilities in the future.

Patching and Updates

Implement the recommended kernel versions to address the CVE-2022-30772 vulnerability and enhance the overall security posture of your systems.