CVE-2019-2399 in Communications Diameter Signaling Router
Summary
by MITRE
Vulnerability in the Oracle Communications Diameter Signaling Router (DSR) component of Oracle Communications Applications (subcomponent: Security). The supported version that is affected is prior to 8.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Communications Diameter Signaling Router (DSR). Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Communications Diameter Signaling Router (DSR) accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Communications Diameter Signaling Router (DSR). CVSS 3.0 Base Score 6.5 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L).
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Analysis
by VulDB Data Team • 06/27/2023
The vulnerability identified as CVE-2019-2399 resides within the Oracle Communications Diameter Signaling Router (DSR) component, specifically within the Security subcomponent of Oracle Communications Applications. This flaw affects all versions prior to 8.3, making it a significant concern for organizations utilizing older deployments of the DSR software. The vulnerability is classified as easily exploitable, meaning that attackers with minimal technical expertise can leverage it to compromise affected systems. The attack vector requires only network access via HTTP protocol, eliminating the need for authentication or specialized access privileges. This accessibility factor significantly increases the attack surface and potential impact of the vulnerability.
The technical implementation flaw manifests as a security weakness that allows unauthorized access to sensitive data within the Diameter Signaling Router environment. The vulnerability enables attackers to perform unauthorized read operations against a subset of data that should normally be restricted to authorized personnel only. Additionally, successful exploitation grants attackers the capability to initiate partial denial of service conditions against the affected DSR system. The CVSS 3.0 scoring system rates this vulnerability with a base score of 6.5, indicating a medium to high severity threat. The scoring reflects the balance between confidentiality impact, which is rated as low due to partial data access rather than complete disclosure, and availability impact, which is also rated as low since only partial denial of service is possible. The vector notation AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L clearly demonstrates that this is a network-based attack requiring no privileges, no user interaction, and affecting an unmodified system with low attack complexity.
From an operational perspective, this vulnerability poses substantial risks to telecommunications infrastructure that relies on Diameter Signaling Router for network operations. The partial denial of service capability can disrupt signaling operations, potentially affecting call routing, authentication, and other critical network functions. The unauthorized data access represents a confidentiality risk, particularly for sensitive signaling information that may contain user authentication credentials, network topology details, or billing information. Organizations deploying older versions of Oracle Communications DSR are particularly vulnerable since patching may require significant system downtime and careful coordination to avoid disrupting ongoing network operations. The vulnerability aligns with CWE-284 (Improper Access Control) and CWE-311 (Missing Encryption of Sensitive Data) categories, reflecting both access control failures and potential data exposure issues. In the context of the MITRE ATT&CK framework, this vulnerability maps to T1190 (Exploit Public-Facing Application) and T1068 (Exploitation for Privilege Escalation) techniques, demonstrating how attackers can leverage publicly accessible services to gain unauthorized access to critical network infrastructure components.
Organizations should immediately prioritize patching their Oracle Communications Diameter Signaling Router deployments to version 8.3 or later to remediate this vulnerability. Network segmentation strategies should be implemented to limit access to the DSR system, particularly restricting HTTP access to only trusted administrative networks. Additionally, organizations should implement monitoring solutions to detect anomalous access patterns or unauthorized data access attempts against their signaling infrastructure. Regular vulnerability assessments should be conducted to identify other potentially affected Oracle Communications Applications components, as similar vulnerabilities may exist in related software modules. Security teams should also review their incident response procedures to ensure readiness for potential exploitation attempts, particularly focusing on network-based attacks targeting telecommunications infrastructure. The vulnerability highlights the importance of maintaining up-to-date security patches in critical network infrastructure components and demonstrates how seemingly minor access control flaws can result in significant operational impacts within telecommunications environments.