CVE-2022-30773 : Security Advisory and Response
Discover the details of CVE-2022-30773, involving DMA attacks on the parameter buffer used by the IhisiSmm driver, leading to potential TOCTOU exploitation. Learn about impacts, technical specifics, and mitigation steps.
A detailed overview of CVE-2022-30773, covering the vulnerability, impact, technical details, and mitigation steps.
Understanding CVE-2022-30773
This section provides insights into the vulnerability identified as CVE-2022-30773 and its implications.
What is CVE-2022-30773?
The CVE-2022-30773 vulnerability involves DMA attacks on the parameter buffer used by the IhisiSmm driver, potentially leading to a Time-of-Check Time-of-Use (TOCTOU) attack. The issue was discovered by Insyde engineering and has been resolved in Kernel versions 5.4: 05.44.23 and 5.5: 05.52.23.
The Impact of CVE-2022-30773
The vulnerability could allow attackers to manipulate the parameter buffer contents after values have been validated but before they are utilized, posing a serious security risk to affected systems.
Technical Details of CVE-2022-30773
Delve into the specifics of the CVE-2022-30773 vulnerability to understand its nature and potential risks.
Vulnerability Description
The vulnerability arises from DMA attacks on the parameter buffer within the IhisiSmm driver, enabling unauthorized changes to data post-validation, opening avenues for exploitation.
Affected Systems and Versions
The vulnerability impacts systems utilizing Kernel versions prior to 5.4: 05.44.23 and 5.5: 05.52.23, emphasizing the importance of updating to the patched versions.
Exploitation Mechanism
Attackers can exploit this vulnerability by manipulating the parameter buffer contents during the brief window between validation and usage, facilitating malicious actions.
Mitigation and Prevention
Explore the recommended measures to mitigate the risks posed by CVE-2022-30773 and enhance overall system security.
Immediate Steps to Take
Ensure the immediate update of affected systems to Kernel versions 5.4: 05.44.23 and 5.5: 05.52.23 to safeguard against potential exploitation of the vulnerability.
Long-Term Security Practices
Implement robust security protocols, such as regular system updates, network monitoring, and access controls, to fortify defenses against similar threats in the future.
Patching and Updates
Stay vigilant for security patches and updates from relevant providers, ensuring timely application to address known vulnerabilities and strengthen system security.