CVE-2018-1991 in API Connect
Summary
by MITRE
IBM API Connect 5.0.0.0, and 5.0.8.6 could could return sensitive information that could provide critical information as to the underlying software stack in CMC UI headers. IBM X-Force ID: 154284.
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Analysis
by VulDB Data Team • 09/23/2023
This vulnerability exists within IBM API Connect versions 5.0.0.0 and 5.0.8.6 where the CMC (Central Management Console) UI headers inadvertently expose sensitive information about the underlying software stack. The flaw allows attackers to gather critical details about the system architecture, potentially revealing version numbers, component names, and other technical artifacts that could be leveraged for further exploitation. This type of information disclosure represents a significant security risk as it provides attackers with valuable reconnaissance data that can inform subsequent attack vectors.
The technical implementation of this vulnerability stems from improper header configuration within the CMC UI components of IBM API Connect. When requests are processed through the management console, certain HTTP headers contain verbose debugging information or system identifiers that should not be exposed to external users. This misconfiguration allows for the leakage of stack traces, framework versions, or other internal system details that typically remain hidden from end users. The vulnerability aligns with CWE-200 which addresses information exposure and represents a classic case of insecure output handling where system internals are exposed through response headers.
The operational impact of this vulnerability extends beyond simple information disclosure, as it significantly weakens the overall security posture of systems running affected IBM API Connect versions. Attackers who discover this information can use it to tailor more sophisticated attacks against known vulnerabilities in specific software versions, potentially bypassing security controls that rely on the assumption that system internals remain unknown. This exposure creates opportunities for privilege escalation, denial of service attacks, or exploitation of other vulnerabilities that may exist in the disclosed software components. The vulnerability also violates fundamental security principles of defense in depth by providing attackers with information that should remain hidden to maintain system security.
Organizations should immediately implement mitigations including disabling or sanitizing header information in the CMC UI, implementing proper access controls for management interfaces, and conducting comprehensive security audits of all system components. The recommended approach involves configuring web servers to strip or modify headers that contain system-specific information, ensuring that only essential headers are exposed to users. Additionally, implementing network segmentation and access control lists can help limit exposure of the management console to authorized personnel only. This vulnerability demonstrates the importance of following security best practices for header management and aligns with ATT&CK technique T1082 which covers system information discovery, highlighting how information disclosure can enable more advanced reconnaissance activities. Regular security updates and patch management should be implemented to address this vulnerability, as IBM has likely released fixes for this issue in subsequent versions of their API Connect software.