CVE-2001-1221 in DWL-1000AP
Summary
by MITRE
D-Link DWL-1000AP Firmware 3.2.28 #483 Wireless LAN Access Point uses a default SNMP community string of public which allows remote attackers to gain sensitive information.
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Analysis
by VulDB Data Team • 05/25/2019
The D-Link DWL-1000AP Wireless LAN Access Point running firmware version 3.2.28 #483 presents a critical security vulnerability through its use of a default SNMP community string of "public" which serves as a well-known and easily guessable credential. This vulnerability falls under the category of weak authentication mechanisms and represents a fundamental flaw in the device's security configuration. The issue stems from the device's default settings that do not adequately secure the Simple Network Management Protocol implementation, which is designed to provide network management capabilities but becomes a security risk when improperly configured. The default community string "public" is widely documented and recognized within the cybersecurity community, making it trivial for unauthorized actors to access sensitive network information and potentially compromise the entire wireless infrastructure.
This vulnerability creates significant operational risks as it allows remote attackers to perform unauthorized access to the device's management interfaces and retrieve critical configuration data, network parameters, and device status information. The flaw enables attackers to gather information about the wireless network topology, authentication settings, signal strength parameters, and other sensitive operational data that could be used for further attacks or network reconnaissance. The use of a default community string violates fundamental security principles and represents a clear violation of the principle of least privilege, where default configurations should never provide access to sensitive resources without explicit user configuration. According to CWE-312, this vulnerability directly relates to the exposure of sensitive information through the use of hardcoded or default credentials, while also aligning with ATT&CK technique T1046 which covers network service scanning and T1082 which involves system information discovery.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with a foothold for more sophisticated attacks within the network infrastructure. Once an attacker gains access through the SNMP interface, they can potentially modify device configurations, disable security features, or use the device as a pivot point for attacking other systems within the network. The vulnerability is particularly concerning because it affects wireless access points that are often deployed in enterprise environments where they serve as critical network components. The default configuration makes this vulnerability easily exploitable by automated scanning tools, significantly increasing the attack surface and reducing the time required for exploitation. Organizations deploying these devices face the risk of complete network compromise if proper security measures are not implemented to address this default configuration issue.
Mitigation strategies for this vulnerability require immediate action to address the default SNMP community string configuration. Network administrators should immediately change the default SNMP community string to a complex, randomly generated value that is not easily guessable or publicly documented. The recommended approach involves implementing strong authentication mechanisms that follow security best practices, including the use of SNMPv3 with proper authentication and encryption protocols rather than relying on the older SNMPv1 or SNMPv2c versions that use community strings. Additionally, network segmentation and access control measures should be implemented to limit the exposure of management interfaces to only authorized personnel and systems. Organizations should also establish regular configuration audits to ensure that default settings have not been reverted or improperly reconfigured, and implement network monitoring to detect unauthorized access attempts to SNMP management interfaces. The vulnerability highlights the importance of proper device hardening procedures and the necessity of reviewing default configurations during network deployment and maintenance activities.