CVE-2020-8232 in EdgeSwitch
Summary
by MITRE
An information disclosure vulnerability exists in EdgeMax EdgeSwitch firmware v1.9.0 that allowed read only users could obtain unauthorized information through SNMP community pages.
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Analysis
by VulDB Data Team • 08/18/2020
The vulnerability identified as CVE-2020-8232 represents a critical information disclosure flaw within the EdgeMax EdgeSwitch firmware version 1.9.0. This issue specifically affects the Simple Network Management Protocol implementation within the network switching infrastructure, creating a significant security risk for organizations relying on these devices for their network operations. The vulnerability stems from improper access controls that fail to adequately restrict information retrieval capabilities for users with read-only privileges, thereby undermining the fundamental security principles of least privilege and proper authorization enforcement.
The technical flaw manifests in the SNMP community page handling mechanism where read-only users can exploit insufficient input validation and access control checks to extract sensitive configuration data and system information. This occurs through the manipulation of SNMP community strings and related management interfaces that should normally be restricted to administrative users with appropriate privileges. The vulnerability allows unauthorized information gathering that can include device configuration details, user accounts, network topology information, and other sensitive operational data that could be leveraged by attackers to plan more sophisticated attacks against the network infrastructure. This type of vulnerability falls under CWE-200, which specifically addresses information exposure, and represents a clear violation of the principle that access to sensitive information should be strictly controlled and authenticated.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with valuable reconnaissance data that can be used for further exploitation attempts. Network administrators who rely on EdgeSwitch devices for their enterprise infrastructure face significant risks when this vulnerability exists, as the leaked information can reveal network design patterns, device configurations, and operational details that would normally be protected. The exposure of SNMP community strings and related management interfaces can enable attackers to perform additional attacks such as configuration modification, service disruption, or even lateral movement within the network. This vulnerability directly aligns with ATT&CK technique T1082, which covers system information discovery, and can contribute to broader reconnaissance activities that precede more targeted attacks. Organizations may experience cascading security issues where this initial information disclosure serves as a foundation for more serious security incidents.
Mitigation strategies for CVE-2020-8232 should prioritize immediate firmware updates to versions that address the SNMP access control implementation flaws. Network administrators must also implement additional security measures such as restricting SNMP access to trusted management stations, disabling unnecessary SNMP services, and implementing network segmentation to limit the potential impact of information disclosure. The remediation process should include comprehensive access control reviews and the implementation of proper network monitoring to detect unauthorized access attempts. Organizations should also consider implementing network access control lists and firewall rules that specifically restrict SNMP traffic to authorized administrative workstations. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other network infrastructure components, ensuring that the security posture remains robust against evolving threats. The vulnerability demonstrates the importance of proper privilege management and access control implementation in network infrastructure devices, as these components often serve as critical entry points for attackers seeking to compromise enterprise networks.