CVE-2020-11554 in SNMPc Online
Summary
by MITRE
An issue was discovered in Castle Rock SNMPc Online 12.10.10 before 2020-01-28. It allows remote attackers to obtain sensitive information via info.php4.
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Analysis
by VulDB Data Team • 05/18/2024
The vulnerability identified as CVE-2020-11554 affects Castle Rock SNMPc Online version 12.10.10 and earlier, representing a significant information disclosure weakness that exposes sensitive system data to remote attackers. This issue stems from improper access controls within the web application interface, specifically through the info.php4 endpoint which should not be publicly accessible. The vulnerability allows unauthenticated remote attackers to retrieve system information including but not limited to configuration details, system paths, user credentials, and potentially other sensitive data that could aid in further exploitation attempts.
The technical flaw manifests through a lack of proper authentication and authorization checks on the info.php4 script, which typically contains diagnostic information and system details that should only be accessible to authorized administrators. This misconfiguration creates an information exposure scenario where attackers can directly access the script without providing valid credentials, leading to the disclosure of sensitive data that could reveal network topology, system architecture, and other potentially valuable intelligence for attackers planning more sophisticated attacks. The vulnerability falls under the category of CWE-200 Information Exposure, which specifically addresses the improper exposure of sensitive information to unauthorized actors.
From an operational impact perspective, this vulnerability creates a substantial risk for organizations using affected versions of SNMPc Online, as it provides attackers with critical intelligence that could be used to plan targeted attacks against the network infrastructure. The disclosed information could include system identifiers, software versions, network configurations, and potentially user account details that would significantly reduce the attack surface and make subsequent exploitation attempts more successful. The vulnerability's remote nature means that attackers do not require physical access or prior authentication to exploit the flaw, making it particularly dangerous in environments where the web interface is exposed to untrusted networks. This weakness aligns with ATT&CK technique T1082 System Information Discovery, where adversaries gather information about the target system to inform their attack strategies.
Organizations should immediately apply the vendor-provided patch released on or before January 28, 2020, to address this vulnerability. In the interim, network administrators should implement firewall rules to restrict access to the info.php4 endpoint and other potentially vulnerable scripts, ensuring that only authorized personnel can access these diagnostic interfaces. Additionally, conducting a comprehensive audit of all web applications to identify similar information disclosure vulnerabilities is recommended. The patch addresses the root cause by implementing proper access controls and authentication checks on the affected script, preventing unauthorized access to sensitive system information. Security monitoring should also be enhanced to detect unusual access patterns to diagnostic endpoints that might indicate exploitation attempts.