Apple iOS, iPadOS, and macOS ImageIO Buffer Overflow Remote Code Execution Vulnerability (CVE-2023-41064)

1. Vulnerability Overview & Root Cause

This vulnerability (CVE-2023-41064) is a buffer overflow issue (CWE-120) residing within Apple's ImageIO framework, which handles image parsing across various operating systems. The root cause lies in inadequate boundary checks and input validation when processing image metadata or pixel streams. By failing to restrict the input size relative to the allocated memory buffer, the system allows out-of-bounds memory writes. Apple addressed this issue by implementing improved memory handling and stricter validation routines.

2. Exploitation Mechanics & Attack Scenario

An attacker exploits this vulnerability by crafting a malicious image file (such as a compromised PNG or TIFF) and delivering it to the target device via vectors like iMessage, web browsers, or email attachments. When the victim's device attempts to render or preview the image, the ImageIO library automatically parses the file in the background. This triggers the buffer overflow, overwriting adjacent memory structures and allowing the attacker to execute arbitrary shellcode with the privileges of the active process. This vulnerability has been actively exploited in the wild as a zero-day exploit.

3. Infrastructure & Business Impact

Given its inclusion in the CISA KEV catalog, this vulnerability poses an immediate and severe threat to enterprise environments. Successful exploitation requires minimal user interaction (often zero-click via messaging apps), allowing threat actors to compromise corporate endpoints, exfiltrate sensitive data, and establish a foothold within the internal network, severely impacting business confidentiality and integrity.