CVE-2017-2864 in Circle with Disney
Summary
by MITRE
An exploitable vulnerability exists in the generation of authentication token functionality of Circle with Disney. Specially crafted network packets can cause a valid authentication token to be returned to the attacker resulting in authentication bypass. An attacker can send a series of packets to trigger this vulnerability.
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Analysis
by VulDB Data Team • 01/06/2023
The vulnerability described in CVE-2017-2864 represents a critical flaw in the authentication token generation mechanism of Circle with Disney's network infrastructure. This issue falls under the category of authentication bypass vulnerabilities, where an attacker can manipulate the system to generate valid authentication tokens without proper credentials. The vulnerability stems from improper validation and handling of network packets during the authentication token creation process, creating a pathway for unauthorized access to protected resources. The flaw demonstrates a fundamental weakness in the security architecture that governs how authentication tokens are generated and validated within the system.
The technical implementation of this vulnerability involves the manipulation of network packet sequences that are processed by the authentication system. When an attacker crafts and sends specially designed packets to the affected system, the token generation functionality fails to properly validate the incoming requests, resulting in the issuance of valid authentication tokens to unauthorized parties. This process violates standard security protocols and demonstrates a lack of proper input sanitization and validation mechanisms. The vulnerability operates at the network protocol level, making it particularly dangerous as it can be exploited remotely without requiring physical access to the system infrastructure.
The operational impact of CVE-2017-2864 extends beyond simple unauthorized access, as it fundamentally compromises the integrity of the entire authentication system. An attacker who successfully exploits this vulnerability can bypass authentication mechanisms and gain access to restricted resources, potentially leading to data breaches, unauthorized transactions, or further lateral movement within the network. The vulnerability's remote exploitability means that attackers can target the system from outside the network perimeter, increasing the attack surface and making the system more vulnerable to widespread compromise. This type of vulnerability directly violates security principles outlined in the OWASP Top Ten and can be classified as a weakness under CWE-284 (Improper Access Control) and CWE-310 (Cryptographic Issues).
Mitigation strategies for this vulnerability require immediate implementation of proper input validation and packet filtering mechanisms. Organizations should deploy network intrusion detection systems to monitor for suspicious packet patterns and implement rate limiting to prevent exploitation attempts. The authentication token generation process must be reviewed and strengthened with proper cryptographic validation and session management protocols. Security patches should be applied to update the authentication system and ensure that all network communications are properly authenticated and authorized. Additionally, implementing network segmentation and zero-trust security models can help limit the potential impact of such vulnerabilities, while regular security assessments and penetration testing can identify similar weaknesses in the system architecture. The vulnerability demonstrates the importance of following secure coding practices and maintaining robust authentication mechanisms as outlined in NIST SP 800-53 security controls and the MITRE ATT&CK framework's authentication bypass techniques.