CVE-2016-5455 in Communications Messaging Server
Summary
by MITRE
Unspecified vulnerability in the Oracle Communications Messaging Server component in Oracle Communications Applications 6.3, 7.0, and 8.0 allows remote attackers to affect confidentiality via vectors related to Multiplexor.
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Analysis
by VulDB Data Team • 09/08/2022
The vulnerability identified as CVE-2016-5455 resides within the Oracle Communications Messaging Server component of Oracle Communications Applications version 6.3, 7.0, and 8.0. This unspecified weakness manifests in the Multiplexor functionality which serves as a critical communication pathway within the messaging infrastructure. The Multiplexor component handles the routing and management of messages across different communication channels, making it a prime target for attackers seeking to compromise the confidentiality of transmitted data. The vulnerability's classification as remote indicates that malicious actors can exploit this weakness without requiring physical access to the system, potentially enabling widespread data interception and unauthorized access to sensitive communications.
The technical nature of this vulnerability falls under the category of confidentiality impact, suggesting that attackers can potentially access or manipulate encrypted or unencrypted data flowing through the Multiplexor component. This type of vulnerability typically stems from improper input validation, insufficient access controls, or flawed cryptographic implementations within the messaging server's communication protocols. The Multiplexor's role in handling message routing and distribution makes it particularly susceptible to attacks that can intercept, modify, or redirect communications between different messaging endpoints. Security researchers have categorized similar vulnerabilities under CWE-200 for exposure of sensitive information and CWE-284 for improper access control, both of which align with the potential impact of this flaw.
Operationally, the exploitation of CVE-2016-5455 could result in significant data breaches affecting organizations that rely on Oracle Communications Messaging Server for their email and messaging infrastructure. Attackers could potentially intercept sensitive corporate communications, personal data, or financial information transmitted through the affected system. The remote nature of the vulnerability means that threat actors can target these systems from anywhere on the internet, making the attack surface extremely broad. Organizations using affected versions may experience unauthorized access to message queues, potential data exfiltration, and disruption of legitimate messaging services. The impact extends beyond simple data theft to include potential service degradation and reputation damage from compromised communication channels.
Mitigation strategies for this vulnerability should include immediate patching of affected Oracle Communications Applications to the latest available versions that address the Multiplexor implementation flaws. Organizations should implement network segmentation to limit access to the messaging server infrastructure and deploy intrusion detection systems to monitor for anomalous communication patterns that might indicate exploitation attempts. Access controls should be strengthened through proper authentication mechanisms and privilege management to reduce the attack surface. Security teams should also consider implementing network monitoring tools specifically designed to detect and alert on suspicious messaging traffic patterns that could indicate exploitation of the Multiplexor vulnerability. Additionally, regular vulnerability assessments and security audits should be conducted to identify and remediate similar weaknesses in other communication components within the organization's infrastructure. The ATT&CK framework categorizes this type of vulnerability under T1041 for Exfiltration Over C2 Channel and T1566 for Phishing, highlighting the potential for both data exfiltration and initial compromise through social engineering tactics that could leverage this vulnerability.