CVE-2018-4169

Vulnerability

CVE-2018-4169 is an out-of-bounds read vulnerability in the Audio component of macOS High Sierra before 10.13.3, macOS Sierra before Security Update 2018-001, and OS X El Capitan before Security Update 2018-001 [1]. The issue is triggered when the system processes a maliciously crafted audio file [1]. The official advisory notes that a memory corruption issue was addressed with improved input validation [1].

Exploitation

An attacker would need to deliver a specially crafted audio file to a targeted macOS system and convince the user to open it [1]. No additional authentication or network access beyond user interaction is required. The vulnerability can be triggered without any special privileges, as processing the malicious file is the sole requirement [1].

Impact

Successful exploitation could allow arbitrary code execution with the privileges of the current user [1]. An attacker could achieve full compromise of the affected system, including code execution, data theft, or further malware installation [1]. The impact is high due to the ability to execute arbitrary code without user interaction beyond opening the file [1].

Mitigation

Apple released the fix in macOS High Sierra 10.13.3, Security Update 2018-001 for Sierra, and Security Update 2018-001 for El Capitan, all dated January 23, 2018 [1]. Users should update to these or later versions to remediate the vulnerability. No workarounds were provided for unpatched systems [1].