CVE-2018-20380 in DDW2600
Summary
by MITRE
Ambit DDW2600 5.100.1009, DDW2602 5.105.1003, T60C926 4.64.1012, and U10C019 5.66.1026 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP requests.
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Analysis
by VulDB Data Team • 04/23/2020
The vulnerability described in CVE-2018-20380 represents a critical information disclosure flaw affecting several Ambit network devices including DDW2600, DDW2602, T60C926, and U10C019 models. This issue stems from improper access controls within the Simple Network Management Protocol implementation of these devices, allowing remote attackers to extract sensitive authentication credentials through specifically crafted SNMP queries. The affected SNMP object identifiers iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 expose administrative credentials without adequate authorization mechanisms, creating a significant security risk for network infrastructure.
The technical exploitation of this vulnerability occurs through SNMP protocol interactions where attackers can send GET requests to the specified MIB (Management Information Base) paths to retrieve sensitive information. These object identifiers correspond to specific administrative credentials within the device's configuration, making them particularly dangerous as they provide direct access to device management interfaces. The flaw exists in the SNMP implementation's lack of proper authentication checks and access control enforcement, allowing unauthenticated remote access to credential information that should remain protected within the device's secure management plane.
This vulnerability directly impacts network security posture by enabling attackers to gain unauthorized access to device management credentials, which can then be used to compromise the entire network infrastructure. The exposed credentials typically include administrative passwords and potentially other sensitive configuration data that would normally be restricted to authorized personnel only. According to CWE-284, this represents an improper access control vulnerability where the system fails to properly enforce access restrictions on sensitive resources, and aligns with ATT&CK technique T1078 for valid accounts and T1566 for credential access through network services.
The operational impact of this vulnerability extends beyond simple credential theft to encompass complete network compromise potential. Once attackers obtain these credentials, they can perform administrative functions including configuration changes, firmware updates, or even device reconfiguration that could lead to denial of service or further network infiltration. Organizations using these affected Ambit devices face significant risk of unauthorized access to their network management systems, potentially allowing attackers to establish persistent access points or conduct advanced persistent threat operations. The vulnerability affects multiple device models from the same vendor, indicating a systemic issue within the SNMP implementation across the product line.
Mitigation strategies for this vulnerability should include immediate firmware updates from the vendor to address the SNMP access control flaw, network segmentation to limit SNMP access to trusted management systems only, and implementation of SNMPv3 with strong authentication and encryption mechanisms. Organizations should also conduct comprehensive network audits to identify and remediate similar vulnerabilities in other network devices, while implementing network monitoring to detect unauthorized SNMP access attempts. The solution aligns with NIST SP 800-53 control CM-7 for configuration management and provides guidance for implementing proper access controls as specified in ISO/IEC 27001 security requirements. Additionally, network administrators should disable SNMPv1 and SNMPv2c if SNMPv3 is available, as these versions lack proper security mechanisms to protect sensitive data from disclosure.