CVE-2016-0323 in Bluemix
Summary
by MITRE
The Auto-Scaling agent in Liberty for Java in IBM Bluemix before 2.7-20160321-1358 allows remote authenticated users to disable X.509 certificate validation, and consequently bypass an intended HTTPS trust-management feature, via unspecified vectors.
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Analysis
by VulDB Data Team • 11/30/2018
The vulnerability identified as CVE-2016-0323 affects the Auto-Scaling agent component within IBM Bluemix Liberty for Java runtime environment. This flaw exists in versions prior to 2.7-20160321-1358 and represents a significant security weakness that undermines the fundamental trust management mechanisms designed to protect against man-in-the-middle attacks. The vulnerability specifically targets the X.509 certificate validation process, which is a critical component of secure HTTPS communications and serves as the primary mechanism for establishing trust between client and server entities in cloud environments.
The technical exploitation of this vulnerability allows authenticated remote attackers to disable X.509 certificate validation, effectively bypassing the intended HTTPS trust-management features that IBM Bluemix implements to secure communications. This capability enables attackers to perform certificate pinning bypasses and potentially intercept or manipulate encrypted communications between the Auto-Scaling agent and other system components. The unspecified vectors suggest that the vulnerability may be accessible through multiple attack surfaces within the Liberty for Java runtime environment, potentially including configuration parameters, API endpoints, or management interfaces that control certificate validation behavior.
From an operational impact perspective, this vulnerability creates a severe risk for organizations using IBM Bluemix services, as it allows attackers to undermine the security posture of their cloud applications. The ability to bypass certificate validation means that attackers can establish fraudulent connections that appear legitimate to the Auto-Scaling agent, potentially enabling them to manipulate scaling decisions or access sensitive system information. This weakness directly violates the principle of least privilege and can lead to unauthorized access to cloud resources, data exfiltration, and potential compromise of the entire Bluemix service ecosystem. The vulnerability affects the integrity and confidentiality of communications within the Liberty for Java environment, undermining the trust model that cloud providers rely upon to secure their services.
Organizations should implement immediate mitigations including upgrading to IBM Bluemix Liberty for Java version 2.7-20160321-1358 or later, which contains the necessary patches to address this vulnerability. System administrators should also review and audit existing Auto-Scaling agent configurations to ensure that certificate validation settings cannot be modified by unauthorized users. The vulnerability aligns with CWE-295, which specifically addresses improper certificate validation, and represents a clear violation of security best practices for secure communication in cloud environments. From an ATT&CK framework perspective, this vulnerability maps to techniques involving credential access and defense evasion, as it enables attackers to bypass security controls while maintaining persistence within the cloud infrastructure. Organizations should also consider implementing additional monitoring and detection mechanisms to identify potential exploitation attempts of this vulnerability in their production environments.