CVE-2018-7959 in eSpace
Summary
by MITRE
There is a short key vulnerability in Huawei eSpace product. An unauthenticated, remote attacker launches man-in-the-middle attack to intercept and decrypt the call information when the user enables SRTP to make a call. Successful exploitation may cause sensitive information leak.
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Analysis
by VulDB Data Team • 06/11/2023
The vulnerability identified as CVE-2018-7959 represents a critical security flaw in Huawei eSpace communication products that fundamentally undermines the confidentiality assurances provided by Secure Real-time Transport Protocol implementation. This weakness specifically affects the key derivation and management processes within the SRTP framework, creating an exploitable condition that allows remote attackers to conduct man-in-the-middle attacks without requiring authentication credentials. The vulnerability resides in the cryptographic implementation where insufficient key length or improper key scheduling algorithms enable attackers to perform brute force or mathematical attacks against the encryption keys used for securing voice communications.
The technical exploitation of this vulnerability occurs when users activate SRTP encryption for their calls, which creates a false sense of security while simultaneously exposing the system to interception. Attackers can leverage this weakness to decrypt call information in real-time, potentially accessing sensitive conversation data, personal identifiers, and business-critical communications. The flaw operates at the cryptographic protocol level, specifically targeting the key exchange mechanisms that should normally prevent unauthorized access to encrypted media streams. This represents a significant deviation from expected cryptographic security standards and demonstrates inadequate implementation of established security protocols. The vulnerability aligns with CWE-327, which addresses the use of weak cryptographic algorithms, and CWE-326, concerning the insufficient encryption strength of data.
From an operational impact perspective, the exploitation of CVE-2018-7959 creates severe consequences for organizations relying on Huawei eSpace systems for secure communications. The ability to intercept and decrypt voice calls without authentication means that sensitive business information, personal data, and confidential discussions can be accessed by unauthorized parties. This vulnerability particularly affects enterprises in regulated industries where communication privacy is mandated, such as healthcare, financial services, and government communications. The remote nature of the attack means that threat actors can exploit this weakness from anywhere on the network, making it extremely difficult to detect and prevent. The vulnerability also has implications for compliance with security frameworks such as NIST SP 800-53 and ISO/IEC 27001, which require robust encryption mechanisms to protect sensitive information. Organizations may face regulatory penalties and legal consequences if sensitive data is compromised through this vulnerability.
Mitigation strategies for CVE-2018-7959 should prioritize immediate remediation through official Huawei patches and firmware updates that address the cryptographic implementation flaws. Organizations should implement network monitoring solutions to detect unusual traffic patterns that might indicate active exploitation attempts. Security teams should consider disabling SRTP functionality temporarily while waiting for official patches, though this may impact legitimate communication services. Network segmentation and access controls can help limit the attack surface, while comprehensive security audits should verify that other cryptographic implementations within the organization are not similarly vulnerable. The vulnerability highlights the importance of proper cryptographic implementation and testing, aligning with ATT&CK techniques related to credential access and defense evasion. Organizations should also consider implementing additional security layers such as secure communication protocols and regular penetration testing to identify similar weaknesses in their communication infrastructure. The incident underscores the necessity of following established security frameworks and maintaining up-to-date security practices to prevent exploitation of cryptographic vulnerabilities that can compromise the confidentiality of sensitive communications.