CVE-2019-0042 in Identity Management
Summary
by MITRE
Juniper Identity Management Service (JIMS) for Windows versions prior to 1.1.4 may send an incorrect message to associated SRX services gateways. This may allow an attacker with physical access to an existing domain connected Windows system to bypass SRX firewall policies, or trigger a Denial of Service (DoS) condition for the network.
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Analysis
by VulDB Data Team • 08/28/2023
The vulnerability identified as CVE-2019-0042 affects Juniper Identity Management Service JIMS for Windows versions prior to 1.1.4, representing a critical security flaw that undermines the integrity of network perimeter protection mechanisms. This issue stems from improper message handling within the JIMS component that manages identity services for network infrastructure, specifically when communicating with SRX series services gateways. The vulnerability is particularly concerning because it can be exploited by attackers who already have physical access to a domain-connected Windows system, eliminating the need for complex remote attack vectors and significantly reducing the barrier to exploitation.
The technical flaw manifests in the incorrect message transmission behavior between the JIMS service and SRX firewalls, where malformed or improperly formatted communication packets are sent to the gateway devices. This improper message handling creates a condition where the SRX services gateways fail to properly evaluate incoming traffic against established firewall policies. The vulnerability is classified under CWE-215 which addresses the issue of information exposure through improper error handling, and it aligns with ATT&CK technique T1072 which covers software deployment methods for persistence and privilege escalation. The flaw essentially allows an attacker to manipulate the communication channel between the identity management service and the firewall, potentially leading to unauthorized network access or service disruption.
The operational impact of this vulnerability extends beyond simple policy bypass to encompass potential network-wide disruption through Denial of Service conditions. When an attacker successfully exploits this vulnerability, they can either gain unauthorized access to network resources by circumventing firewall restrictions or cause legitimate network services to become unavailable through DoS attacks. This dual nature makes the vulnerability particularly dangerous as it provides both reconnaissance and exploitation capabilities within a single attack vector. The attack requires only physical access to an existing domain-connected Windows system, making it a significant concern for organizations that do not adequately secure their physical access points or implement proper device management policies. The vulnerability affects the fundamental trust model between identity management systems and network security appliances, potentially allowing attackers to establish persistent access to network resources while remaining undetected by traditional monitoring systems.
Organizations should immediately implement mitigations including updating to JIMS version 1.1.4 or later, which contains the necessary patches to address the improper message handling behavior. Network administrators should also consider implementing additional monitoring for unusual communication patterns between JIMS services and SRX gateways, as well as reviewing physical access controls to domain-connected systems. The vulnerability demonstrates the importance of proper input validation and error handling in security-critical components, as highlighted in industry best practices for secure software development. Organizations should also conduct comprehensive audits of their identity management systems to identify other potential communication channels that might be susceptible to similar flaws, ensuring that the security controls remain robust against both remote and local attack vectors that could compromise network perimeters.