CVE-2022-36448 : Security Advisory and Response

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5, leading to an SMM memory corruption vulnerability in the Software SMI handler in the PnpSmm driver.

Understanding CVE-2022-36448

This CVE pertains to a security issue found in the Insyde InsydeH2O firmware with kernel versions 5.0 through 5.5.

What is CVE-2022-36448?

A memory corruption vulnerability exists in the Software System Management Interrupt (SMI) handler within the PnpSmm driver of the affected Insyde InsydeH2O firmware versions.

The Impact of CVE-2022-36448

This vulnerability could be exploited by attackers to execute arbitrary code or crash the system, potentially leading to denial of service or privilege escalation attacks.

Technical Details of CVE-2022-36448

This section provides more insight into the vulnerability.

Vulnerability Description

The vulnerability arises due to improper handling of SMI requests by the PnpSmm driver, which could result in memory corruption.

Affected Systems and Versions

Insyde InsydeH2O firmware versions 5.0 through 5.5 are impacted by this vulnerability.

Exploitation Mechanism

Attackers could exploit this flaw by sending specially crafted SMI requests to the system, triggering the memory corruption vulnerability.

Mitigation and Prevention

To safeguard systems from potential exploits, it is crucial to follow these security measures.

Immediate Steps to Take

Organizations should apply vendor-supplied patches promptly to mitigate the vulnerability.
Implement stringent access controls to limit exposure to the affected systems.

Long-Term Security Practices

Regularly update firmware and software to address security vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate risks.

Patching and Updates

Keep abreast of security advisories from Insyde and apply patches as soon as they are made available.
Monitor for any unusual system behavior that could indicate a potential exploit.