CVE-2016-5968 in Tealeaf Customer Experience
Summary
by MITRE
The Replay Server in IBM Tealeaf Customer Experience 8.x before 8.7.1.8847 FP10, 8.8.x before 8.8.0.9049 FP9, 9.0.0 and 9.0.1 before 9.0.1.1117 FP5, 9.0.1A before 9.0.1.5108 FP5, 9.0.2 before 9.0.2.1223 FP3, and 9.0.2A before 9.0.2.5224 FP3 allows remote attackers to conduct SSRF attacks via unspecified vectors.
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Analysis
by VulDB Data Team • 06/09/2019
The vulnerability identified as CVE-2016-5968 represents a critical server-side request forgery flaw within IBM Tealeaf Customer Experience software versions across multiple release streams. This vulnerability exists in the Replay Server component that processes and handles user interactions and session data for customer experience analytics. The affected versions span across the 8.x, 9.0.0, 9.0.1, 9.0.1A, 9.0.2, and 9.0.2A branches, with specific patch levels indicating the scope of impacted releases. The vulnerability enables remote attackers to manipulate the server into making unintended requests to internal or external systems, potentially exposing sensitive infrastructure components and data sources that should remain protected within the organization's network perimeter. This represents a significant security weakness that directly violates the principle of least privilege and proper network segmentation.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the Replay Server's request processing logic. Attackers can exploit this weakness by crafting malicious requests that contain specially formatted URLs or URI references which the server will attempt to resolve and forward to other systems. This flaw operates at the application layer and can be leveraged to bypass firewalls and network security controls that typically protect internal systems. The unspecified vectors suggest that multiple attack surfaces within the server's processing capabilities could be exploited, potentially including HTTP headers, URL parameters, or session data handling mechanisms. According to CWE classification, this vulnerability maps to CWE-918 Server-Side Request Forgery, which is categorized under the broader weakness of improper input validation and inadequate access controls.
The operational impact of this vulnerability extends beyond simple data exposure to encompass potential system compromise and lateral movement within affected networks. Remote attackers could leverage the SSRF capability to probe internal network services, potentially discovering and targeting vulnerable internal systems such as databases, administrative interfaces, or other backend services that are not directly exposed to the internet. The implications are particularly severe for organizations using IBM Tealeaf Customer Experience in environments where sensitive customer data and business-critical systems coexist within the same network infrastructure. This vulnerability could enable attackers to perform reconnaissance activities, escalate privileges, or even facilitate more sophisticated attacks such as credential theft or data exfiltration. The attack surface is amplified by the fact that the Replay Server typically operates with elevated privileges to process customer interaction data, making successful exploitation potentially more damaging than typical SSRF attacks.
Organizations should immediately implement mitigations including applying the vendor-provided patches for all affected versions, implementing network segmentation to isolate the Replay Server from critical internal systems, and configuring strict firewall rules to prevent outbound connections from the server to internal networks. Network monitoring should be enhanced to detect unusual outbound requests that may indicate exploitation attempts. Additionally, organizations should consider implementing web application firewalls and input validation controls to prevent malformed requests from reaching the vulnerable server components. The remediation process should follow IBM's official security advisory guidance and include thorough testing of patched environments to ensure that the vulnerability is properly addressed without introducing regressions in functionality. This vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing robust network security controls to prevent attackers from exploiting server-side weaknesses that could compromise entire organizational infrastructures. The attack pattern aligns with ATT&CK technique T1071.004 Application Layer Protocol: DNS, as attackers may utilize DNS resolution capabilities to expand their attack scope beyond initial access points.