CVE-2017-2452 in iOS
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 10.3 is affected. The issue involves the "Siri" component. It allows physically proximate attackers to read text messages on the lock screen via unspecified vectors.
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Analysis
by VulDB Data Team • 11/21/2022
The vulnerability identified as CVE-2017-2452 represents a significant security flaw in Apple's Siri voice assistant component affecting iOS versions prior to 10.3. This weakness resides within the lock screen text message display functionality and creates a serious privacy risk for users who rely on their devices in public spaces. The issue specifically impacts devices where Siri's interaction mechanisms can be exploited without requiring authentication or explicit user consent, making it particularly concerning for mobile device security.
The technical nature of this vulnerability stems from insufficient input validation and access control mechanisms within the Siri component's integration with the lock screen messaging interface. Attackers positioned in close physical proximity to a target device can potentially trigger Siri to read out text messages displayed on the lock screen through unspecified attack vectors that exploit the voice recognition and response system. This flaw demonstrates a critical failure in the device's security model where the lock screen protection mechanisms are bypassed through legitimate user interaction with the voice assistant component. The vulnerability operates at the intersection of user interface security and voice command processing, creating an unexpected attack surface that should not have been accessible to unauthorized parties.
From an operational impact perspective, this vulnerability exposes users to significant privacy breaches when their devices are in physical proximity to potential attackers. The attack requires only physical access to the device rather than sophisticated technical skills or network-based exploitation methods, making it particularly dangerous in public environments such as offices, public transportation, or crowded areas. Users who store sensitive information in text messages are at risk of having their private communications exposed without their knowledge or consent, potentially leading to identity theft, financial fraud, or other malicious activities. The vulnerability essentially undermines the fundamental security premise of lock screen protection, where users expect their messages to remain private when the device is secured.
Security professionals should note this vulnerability aligns with CWE-284 Access Control Issues and potentially relates to CWE-310 Cryptographic Issues depending on how the voice processing and message access occurs. The attack pattern follows the MITRE ATT&CK framework's technique T1056.001 for Input Capture through voice recognition manipulation, demonstrating how seemingly benign user interface features can create security risks when not properly secured. Organizations should implement immediate mitigation strategies including ensuring all devices are updated to iOS 10.3 or later, which contains the necessary patches to address this vulnerability. Additionally, users should be educated about the risks of leaving devices unattended in public spaces and should consider additional security measures such as using more robust lock screen protections or disabling Siri access when the device is locked. The vulnerability serves as a reminder of the importance of comprehensive security testing for all device components, particularly those that interface with user interaction systems and may have unexpected attack surfaces.