CVE-2024-44308 is a vulnerability in Apple Safari that arises from insufficient validation when processing web content, enabling an attacker to execute arbitrary code on the victim's machine. The vulnerability affects Intel-based Mac systems and possibly other Apple platforms running vulnerable Safari versions prior to 18.1.1 and corresponding OS updates. The flaw is triggered by a user visiting a maliciously crafted webpage, which exploits the improper checks in Safari's web content processing engine. This leads to the execution of attacker-controlled code with the privileges of the user running Safari. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, but requiring user interaction. The impact includes full compromise of confidentiality, integrity, and availability of the affected system. Apple has addressed the issue by implementing improved validation checks in Safari 18.1.1, iOS 17.7.2, iPadOS 17.7.2, macOS Sequoia 15.1.1, and other related OS versions. While no confirmed widespread exploitation is reported, Apple acknowledges potential active exploitation on Intel-based Macs. This vulnerability is particularly critical because Safari is a widely used browser on Apple devices, and the ability to execute arbitrary code remotely poses significant risks to users and organizations. Attackers could leverage this flaw to deploy malware, steal sensitive data, or establish persistent footholds within targeted environments.

For European organizations, this vulnerability poses a significant risk due to the widespread use of Apple devices, including Intel-based Macs, in corporate and governmental environments. Successful exploitation can lead to complete system compromise, enabling attackers to steal sensitive information, disrupt operations, or move laterally within networks. Sectors such as finance, healthcare, government, and critical infrastructure are particularly vulnerable due to the high value of their data and systems. The requirement for user interaction means phishing or social engineering campaigns could be used to lure victims to malicious websites. Given the active exploitation reports, organizations face an elevated threat level. Additionally, the vulnerability could undermine trust in secure communications and data confidentiality, impacting compliance with European data protection regulations like GDPR. The potential for widespread impact is heightened by Safari's integration with other Apple services and devices, which are common in European business and personal use.

European organizations should immediately prioritize patching all affected Apple devices by updating Safari to version 18.1.1 or later and applying the corresponding OS updates (iOS 17.7.2, iPadOS 17.7.2, macOS Sequoia 15.1.1, etc.). Beyond patching, organizations should implement network-level protections such as web filtering to block access to known malicious sites and employ endpoint detection and response (EDR) solutions to monitor for suspicious activity related to Safari processes. User awareness training should emphasize the risks of clicking on unknown links and visiting untrusted websites. Deploying browser security extensions that limit script execution or sandbox web content can reduce exploitation risk. Organizations should also review and tighten their incident response plans to quickly identify and contain potential breaches stemming from this vulnerability. Regular audits of Apple device inventories and ensuring timely updates are critical to maintaining security posture. Finally, consider restricting Safari usage or enforcing alternative browsers in high-risk environments until patches are fully deployed.