CVE-2014-4354

Vulnerability

In Apple iOS versions prior to 8, Bluetooth is automatically enabled during all upgrade actions (e.g., software updates). This behavior creates an unintended open Bluetooth interface during the upgrade process, making it easier for remote attackers to bypass intended access restrictions. The affected versions are iOS 7 and earlier.

Exploitation

An attacker must be within Bluetooth range of the target device while an upgrade is in progress. No prior authentication or pairing is required; the attacker can initiate a Bluetooth session with the device during the upgrade window. The exact sequence involves the attacker scanning for devices with Bluetooth enabled during an upgrade and then connecting to bypass normal access controls.

Impact

Successful exploitation allows an attacker to bypass the device's intended access restrictions, potentially gaining unauthorized access to the device or its data over Bluetooth. This could lead to information disclosure or further compromise of the device.

Mitigation

The vulnerability is fixed in iOS 8, released on September 17, 2014 [1]. Users should upgrade to iOS 8 or later. No workaround is available for earlier versions. The issue is not listed on the CISA Known Exploited Vulnerabilities catalog.