CVE-2013-4872 in Glass
Summary
by MITRE
Google Glass before XE6 does not properly restrict the processing of QR codes, which allows physically proximate attackers to modify the configuration or redirect users to arbitrary web sites via a crafted symbol, as demonstrated by selecting a Wi-Fi access point in order to conduct a man-in-the-middle attack.
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Analysis
by VulDB Data Team • 05/07/2018
The vulnerability identified as CVE-2013-4872 represents a critical security flaw in Google Glass devices running versions prior to XE6, specifically concerning the improper handling of QR code processing. This weakness stems from insufficient input validation and sanitization mechanisms within the device's operating system, creating a pathway for malicious actors to exploit the device's functionality for unauthorized network access and data interception. The vulnerability operates at the application level, affecting the device's ability to properly validate and process QR code data, which is typically used for quick configuration and network connection establishment.
The technical implementation of this vulnerability allows attackers within physical proximity to manipulate QR code data in ways that bypass normal security controls. When a user scans a maliciously crafted QR code, the device processes the data without adequate verification, potentially redirecting the user to attacker-controlled web services or modifying network configuration parameters. This flaw specifically targets the device's wireless network management capabilities, enabling attackers to establish unauthorized connections to networks and position themselves as man-in-the-middle intermediaries. The vulnerability's exploitation requires only physical proximity to the target device, making it particularly concerning for environments where device security cannot be guaranteed.
The operational impact of this vulnerability extends beyond simple network redirection, as it fundamentally undermines the security model of Google Glass devices. Attackers can leverage this weakness to conduct sophisticated man-in-the-middle attacks, potentially intercepting sensitive communications, stealing authentication credentials, or redirecting users to phishing sites. The vulnerability affects the device's trust model, as users cannot reliably verify the authenticity of network connections established through QR code scanning. This weakness also impacts the device's overall security posture by allowing attackers to modify device configuration settings that should normally require explicit user authorization or authentication.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and sanitization mechanisms for QR code processing. Device manufacturers should enforce strict validation of QR code content, including cryptographic verification of data integrity and authentication of source origins. Network configuration changes should include mandatory user confirmation for network connection establishment, particularly when initiated through QR code scanning. The vulnerability demonstrates the importance of implementing robust security controls at the application level, aligning with CWE principles for input validation and secure data processing. Organizations should also consider implementing network monitoring solutions to detect anomalous network behavior that could indicate exploitation attempts. This vulnerability aligns with ATT&CK techniques related to credential access and network sniffing, emphasizing the need for comprehensive security controls that address both physical and network-based attack vectors.