CVE-2022-47520 : What You Need to Know

An issue was discovered in the Linux kernel before 6.0.11. This vulnerability arises due to missing offset validation in drivers/net/wireless/microchip/wilc1000/hif.c in the WILC1000 wireless driver. It can trigger an out-of-bounds read when parsing a Robust Security Network (RSN) information element from a Netlink packet.

Understanding CVE-2022-47520

This section will delve into the details of CVE-2022-47520, explaining what it is, its impact, technical aspects, and mitigation strategies.

What is CVE-2022-47520?

CVE-2022-47520 highlights a critical security flaw in the WILC1000 wireless driver within the Linux kernel, potentially leading to out-of-bounds read vulnerabilities.

The Impact of CVE-2022-47520

The impact of this vulnerability is significant as it can be exploited to trigger out-of-bounds reads, which may lead to unauthorized access or denial of service attacks.

Technical Details of CVE-2022-47520

Let's dive deeper into the technical aspects of CVE-2022-47520 to understand its vulnerability description, affected systems, and exploitation mechanisms.

Vulnerability Description

The vulnerability stems from missing offset validation in the WILC1000 wireless driver, specifically in the handling of Robust Security Network (RSN) information elements.

Affected Systems and Versions

The affected systems include versions of the Linux kernel prior to 6.0.11 that utilize the WILC1000 wireless driver, potentially leaving them exposed to out-of-bounds read vulnerabilities.

Exploitation Mechanism

Exploiting CVE-2022-47520 involves crafting a malicious Netlink packet containing a specific RSN information element to trigger the out-of-bounds read in the wireless driver.

Mitigation and Prevention

In light of CVE-2022-47520, it is crucial for users to take immediate steps, adopt long-term security practices, and ensure timely patching and updates.

Immediate Steps to Take

Users are advised to apply relevant security updates provided by the Linux kernel maintainers or vendor-specific patches to mitigate the CVE-2022-47520 vulnerability.

Long-Term Security Practices

Implementing network segmentation, access control policies, and regular security audits can enhance overall cybersecurity posture and help prevent similar vulnerabilities.

Patching and Updates

Stay informed about security advisories from Linux kernel maintainers or relevant vendors to promptly apply patches and updates addressing CVE-2022-47520.