CVE-2020-9075 in Secospace USG6300
Summary
by MITRE
Huawei products Secospace USG6300;USG6300E with versions of V500R001C30,V500R001C50,V500R001C60,V500R001C80,V500R005C00,V500R005C10;V600R006C00 have a vulnerability of insufficient input verification. An attacker with limited privilege can exploit this vulnerability to access a specific directory. Successful exploitation of this vulnerability may lead to information leakage.
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Analysis
by VulDB Data Team • 06/16/2020
The vulnerability identified as CVE-2020-9075 affects Huawei Secospace USG6300 and USG6300E firewall appliances running specific firmware versions including V500R001C30, V500R001C50, V500R001C60, V500R001C80, V500R005C00, V500R005C10, and V600R006C00. This represents a critical security weakness in the input validation mechanisms of these network security devices, specifically targeting their web-based management interfaces. The vulnerability stems from inadequate verification of user-supplied input parameters, creating an avenue for unauthorized access to sensitive system directories.
This flaw constitutes a classic insufficient input validation vulnerability, which maps directly to CWE-20 - Improper Input Validation within the Common Weakness Enumeration framework. The technical implementation appears to involve the failure of the firewall's authentication and authorization mechanisms to properly sanitize or validate user input when processing directory access requests. Attackers with limited privileges can exploit this weakness by crafting specific input parameters that bypass normal access controls, allowing them to traverse into restricted directories that should otherwise be protected from unauthorized access.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with potential access to sensitive system files, configuration data, and potentially administrative functions. According to ATT&CK framework, this vulnerability aligns with T1078 - Valid Accounts and T1566 - Phishing, as it could enable attackers to escalate privileges or gain unauthorized access to system resources through manipulated input parameters. The vulnerability could be exploited by attackers who have already gained some level of access to the device, potentially through phishing attacks or other initial compromise methods, to further explore and extract sensitive information from the firewall's file system.
The exploitation of this vulnerability could result in significant information leakage including system configurations, user credentials, network topology information, and potentially other sensitive operational data. Such exposure could enable attackers to conduct more sophisticated attacks, including lateral movement within the network, privilege escalation, or targeted attacks against other systems that rely on the information obtained. Organizations using these affected Huawei firewall models face potential risks to their network security posture, particularly if attackers can leverage this vulnerability to gain deeper system access.
Mitigation strategies should include immediate firmware updates to versions that address the insufficient input validation issue, as well as implementing network segmentation to limit access to these devices. Security administrators should also consider implementing additional monitoring and logging of directory access attempts, as well as conducting regular vulnerability assessments to identify similar weaknesses in other network infrastructure components. The affected devices should be isolated from untrusted networks and access should be restricted to authorized personnel only through secure authentication mechanisms. Organizations should also review their incident response procedures to ensure rapid detection and remediation of similar vulnerabilities that may exist in their network security infrastructure.