CVE-2014-4368

Vulnerability

The Accessibility subsystem in Apple iOS versions prior to 8 contains a vulnerability that allows unauthorized interference with the screen locking mechanism. The issue specifically involves AssistiveTouch events, enabling an attacker to bypass or disrupt the screen lock state. All devices running iOS versions earlier than 8 are affected, including iPhone 4s and later, iPod touch (5th generation) and later, and iPad 2 and later [1].

Exploitation

An attacker must have physical access to the device. By sending or generating specific AssistiveTouch events, the attacker can interact with the screen lock sequence in a way that prevents the lock from engaging or disables the lock screen entirely. No authentication or special privileges are required beyond being able to touch the screen [1].

Impact

Successful exploitation allows an attacker to bypass the screen lock, gaining unauthorized access to the device and its data. This compromises the confidentiality and integrity of information stored on the device. The attack can be performed without the user's knowledge [1].

Mitigation

Apple addressed this vulnerability in iOS 8, released on September 17, 2014. Users should update to iOS 8 or later to mitigate the issue. No other workarounds have been disclosed. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog [1].