CVE-2022-22628 is a high-severity use-after-free vulnerability affecting Apple Safari browser and related Apple operating systems including macOS Monterey 12.3, Safari 15.4, watchOS 8.5, iOS 15.4, iPadOS 15.4, and tvOS 15.4. The vulnerability arises from improper memory management when processing maliciously crafted web content, which can lead to arbitrary code execution. Specifically, a use-after-free condition occurs when the browser attempts to access memory that has already been freed, potentially allowing an attacker to execute arbitrary code in the context of the affected application. Exploitation requires the victim to visit a maliciously crafted web page, thus user interaction is necessary. The CVSS v3.1 base score is 8.8, indicating a high severity with network attack vector, low attack complexity, no privileges required, but user interaction is needed. The impact includes full compromise of confidentiality, integrity, and availability of the affected system or user session. Apple addressed this vulnerability by improving memory management in the affected components, and patches are available in the specified OS and Safari versions. No known exploits in the wild have been reported as of the publication date, but the nature of the vulnerability and its high CVSS score make it a significant threat if weaponized.

For European organizations, this vulnerability poses a significant risk especially to those with employees or users utilizing Apple devices and Safari browser. Successful exploitation could lead to arbitrary code execution, allowing attackers to install malware, steal sensitive data, or gain persistent access to corporate networks. This is particularly critical for sectors handling sensitive personal data under GDPR, such as finance, healthcare, and government agencies. The requirement for user interaction (visiting a malicious website) means phishing or drive-by download attacks could be vectors. Given the widespread use of Apple devices in Europe, including in enterprise and government environments, exploitation could lead to data breaches, operational disruption, and reputational damage. The vulnerability also affects multiple Apple platforms, increasing the attack surface. Organizations relying on Apple ecosystems must prioritize patching to mitigate potential impacts.

European organizations should implement a targeted patch management strategy to ensure all Apple devices are updated to macOS Monterey 12.3, Safari 15.4, watchOS 8.5, iOS 15.4, iPadOS 15.4, or tvOS 15.4 as applicable. Beyond patching, organizations should: 1) Enforce strict web filtering and block access to known malicious or suspicious websites to reduce exposure to crafted web content. 2) Deploy endpoint detection and response (EDR) solutions capable of detecting anomalous behavior indicative of exploitation attempts. 3) Conduct user awareness training focused on phishing and safe browsing practices to minimize the risk of user interaction with malicious content. 4) Utilize network segmentation to limit lateral movement if a device is compromised. 5) Monitor threat intelligence feeds for any emerging exploits targeting this vulnerability to enable rapid response. 6) Consider deploying browser isolation technologies for high-risk users to contain potential exploitation. These measures, combined with timely patching, will significantly reduce the risk posed by CVE-2022-22628.