CVE-2018-6017 in Tinder
Summary
by MITRE
Unencrypted transmission of images in Tinder iOS app and Tinder Android app allows an attacker to extract private sensitive information by sniffing network traffic.
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Analysis
by VulDB Data Team • 12/27/2019
The vulnerability described in CVE-2018-6017 represents a critical security flaw in the Tinder mobile applications for both iOS and Android platforms. This issue stems from the improper handling of network communications where image data is transmitted without encryption, creating a significant attack surface for malicious actors. The flaw affects the core functionality of the application's data transmission mechanisms, specifically targeting the secure communication channels used to deliver user-generated content. Security researchers identified that when users interact with the application, particularly when uploading or viewing images, the data flows through unencrypted channels that can be intercepted by attackers positioned within the network path.
The technical implementation of this vulnerability manifests through the absence of proper transport layer security measures within the mobile application's networking stack. When Tinder clients establish connections to their backend services, they fail to implement secure communication protocols such as TLS encryption for image transmission. This creates a scenario where network traffic can be captured and analyzed using standard packet sniffing tools, allowing attackers to intercept and extract sensitive information from image payloads. The flaw specifically impacts the application's handling of binary image data, which may contain user-specific information including personal identifiers, facial features, and other contextual details that could be exploited for identity theft or social engineering attacks.
The operational impact of this vulnerability extends beyond simple data exposure, creating multiple attack vectors for threat actors seeking to exploit user privacy. Network sniffing attacks can reveal not only the images themselves but also metadata associated with these files, potentially including timestamps, device information, and location data embedded within image EXIF data. This exposure creates opportunities for attackers to correlate user activities, build behavioral profiles, and potentially identify users through facial recognition systems. The vulnerability affects all users of the affected platforms and represents a fundamental breakdown in the application's security architecture, particularly concerning the protection of user-generated content and personal information. According to CWE classification, this vulnerability maps to CWE-319: Cleartext Transmission of Sensitive Information, which specifically addresses the transmission of confidential data without adequate encryption.
The exploitation of this vulnerability aligns with several tactics outlined in the MITRE ATT&CK framework, particularly focusing on credential access and collection phases where attackers can harvest sensitive data through network reconnaissance and interception techniques. Threat actors can leverage this weakness to perform man-in-the-middle attacks, capturing image data as it flows between mobile devices and Tinder's servers. The impact is further amplified by the nature of the Tinder platform, where users typically share personal photos and images that may contain sensitive information about their location, lifestyle, and personal relationships. This vulnerability essentially removes the security controls that should protect user privacy during data transmission, making the application particularly susceptible to passive network monitoring attacks that require minimal technical expertise to execute.
The recommended mitigations for this vulnerability involve implementing proper transport layer security measures across all network communications within the Tinder application. Mobile application developers must ensure that all data transmission, particularly binary content like images, utilizes encrypted channels with strong cryptographic protocols such as TLS 1.2 or higher. This includes configuring the application to reject unencrypted connections and enforcing secure communication standards throughout the entire application lifecycle. Security patches should implement mandatory encryption for all image data transmission, including proper certificate validation and secure key management practices. Organizations should also conduct regular security assessments to identify and remediate similar vulnerabilities in their network communication protocols, ensuring that sensitive data is protected both in transit and at rest. The fix requires comprehensive application-level changes to the networking code, including the implementation of secure socket connections and proper error handling for encryption failures.