CVE-2017-15326 in DBS3900 TDD LTE
Summary
by MITRE
DBS3900 TDD LTE V100R003C00, V100R004C10 have a weak encryption algorithm security vulnerability. DBS3900 TDD LTE supports SSL/TLS protocol negotiation using insecure encryption algorithms. If an insecure encryption algorithm is negotiated in the communication, an unauthenticated remote attacker can exploit this vulnerability to crack the encrypted data and cause information leakage.
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Analysis
by VulDB Data Team • 02/22/2023
The CVE-2017-15326 vulnerability affects DBS3900 TDD LTE base station devices running firmware versions V100R003C00 and V100R004C10, representing a critical weakness in the cryptographic implementation that undermines the security of communications. This vulnerability specifically targets the Secure Sockets Layer and Transport Layer Security protocol negotiation mechanisms, where the device fails to properly enforce strong cryptographic standards during the establishment of secure connections.
The technical flaw stems from the device's inability to adequately validate or enforce the use of robust encryption algorithms during SSL/TLS handshakes, allowing for the negotiation of weak cryptographic protocols that are susceptible to cryptographic attacks. This weakness creates an exploitable condition where an unauthenticated remote attacker can manipulate the protocol negotiation process to force the use of insecure encryption methods. The vulnerability aligns with CWE-327, which addresses the use of weak cryptographic algorithms, and represents a significant deviation from security best practices outlined in NIST SP 800-52 and RFC 5246 for TLS implementation.
The operational impact of this vulnerability is severe as it enables man-in-the-middle attacks where adversaries can intercept and decrypt sensitive communication traffic without requiring authentication credentials. This information leakage can compromise network integrity, user privacy, and potentially expose critical infrastructure data. The vulnerability affects the fundamental security posture of the LTE network infrastructure, potentially allowing attackers to access signaling information, user data, or control plane communications that traverse these devices. The risk is particularly elevated in environments where the affected devices are deployed in critical telecommunications infrastructure where unauthorized access could lead to service disruption or data breaches.
Mitigation strategies should prioritize immediate firmware updates to address the cryptographic weakness in SSL/TLS implementation, along with implementing network monitoring to detect and alert on insecure protocol negotiations. Organizations should enforce strict cryptographic policy enforcement mechanisms that prevent negotiation of weak algorithms and consider implementing additional network segmentation controls. The vulnerability demonstrates the importance of proper cryptographic protocol implementation as outlined in the MITRE ATT&CK framework's T1071.004 technique for application layer protocol usage, where secure communication channels are essential for maintaining network security. Regular security assessments and compliance verification against industry standards including ISO/IEC 27001 and NIST cybersecurity frameworks should be implemented to prevent similar cryptographic weaknesses in future deployments.