CVE-2016-3973 in Netweaver Java AS
Summary
by MITRE
The chat feature in the Real-Time Collaboration (RTC) services in SAP NetWeaver Java AS 7.4 allows remote attackers to obtain sensitive user information via unspecified vectors related to WD_CHAT, aka SAP Security Note 2255990.
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Analysis
by VulDB Data Team • 02/04/2019
The vulnerability identified as CVE-2016-3973 resides within the Real-Time Collaboration RTC services of SAP NetWeaver Java Application Server version 7.4, specifically affecting the WD_CHAT component that handles chat functionality. This issue represents a critical information disclosure weakness that enables remote attackers to extract sensitive user data through unspecified attack vectors, as documented in SAP Security Note 2255990. The flaw fundamentally compromises the confidentiality of user communications and personal data within the SAP environment.
The technical implementation of this vulnerability stems from inadequate access controls and data sanitization within the chat service architecture. The WD_CHAT component appears to improperly handle user session information and communication data, allowing unauthorized remote actors to intercept or retrieve sensitive information from active chat sessions. This weakness aligns with CWE-200, which categorizes improper information exposure as a fundamental security flaw. The vulnerability's impact extends beyond simple data leakage as it potentially enables attackers to gather intelligence about user activities, communication patterns, and potentially sensitive business information exchanged through the collaboration platform.
From an operational perspective, this vulnerability poses significant risks to organizations utilizing SAP NetWeaver Java AS 7.4 for business collaboration. Attackers could exploit this weakness to gain insights into employee communications, business strategies, project details, and other confidential information that flows through the chat system. The remote nature of the attack vector means that threat actors do not require physical access or local network presence to exploit this vulnerability, making it particularly dangerous in cloud and distributed computing environments. The potential for credential harvesting or session hijacking through this information disclosure could lead to further compromise of the SAP infrastructure and broader network resources.
Organizations should implement immediate mitigation strategies including applying the relevant SAP security patches and updates referenced in SAP Security Note 2255990. Network segmentation and access controls should be strengthened to limit exposure of the RTC services to trusted networks only. Additionally, monitoring and logging mechanisms should be enhanced to detect unusual access patterns or data retrieval activities within the chat components. The vulnerability demonstrates the importance of secure coding practices in enterprise collaboration systems and highlights the need for regular security assessments of business application components. Organizations should also consider implementing network-based intrusion detection systems to monitor for exploitation attempts targeting this specific vulnerability, as outlined in the attack techniques documented within the MITRE ATT&CK framework for application layer attacks.