Threat Analysis

On September 21, 2023, Apple took swift action by issuing critical security updates to address three previously undisclosed zero-day vulnerabilities that had been exploited in targeted attacks against users of iPhone and Mac devices. Among these vulnerabilities, two were identified in Apple's WebKit browser engine (CVE-2023-41993) and the Security framework (CVE-2023-41991). If successfully exploited, these vulnerabilities could enable malicious actors to circumvent signature validation through rogue applications or achieve arbitrary code execution through maliciously crafted webpages.

The third vulnerability (CVE-2023-41992) was located within the Kernel Framework. In the event of successful exploitation, this vulnerability could provide threat actors who already possess the capability to execute code on the local system with an opportunity to escalate their privileges. In response to these security threats, Apple promptly released comprehensive updates for their various operating systems, including macOS, iOS, iPadOS, and watchOS.

These updates effectively addressed the vulnerabilities by rectifying a certificate validation issue and introducing enhanced security measures, ensuring the continued protection and integrity of Apple users' devices and data.

List of Vulnerabilities

1. CVE-2023-41992

2. CVE-2023-41993

3. CVE-2023-41991

References

1. https://support.apple.com/en-us/HT213926

2. https://support.apple.com/en-us/HT213926

3. https://www.bleepingcomputer.com/news/apple/apple-emergency-updates-fix-3-new-zero-days-exploited-in-attacks/