CVE-2020-7236 in UHP-100
Summary
by MITRE
UHP UHP-100 3.4.1.15, 3.4.2.4, and 3.4.3 devices allow XSS via cw2?td= (Site Name field of the Site Setup section).
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Analysis
by VulDB Data Team • 03/24/2024
The vulnerability identified as CVE-2020-7236 affects UHP UHP-100 devices running firmware versions 3.4.1.15, 3.4.2.4, and 3.4.3, representing a cross-site scripting vulnerability that poses significant security risks to network infrastructure. This flaw exists within the Site Setup section of the device's web interface, specifically in the Site Name field designated by the parameter cw2?td=. The vulnerability stems from inadequate input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before rendering it within the web application context.
The technical implementation of this vulnerability allows an attacker to inject malicious scripts into the Site Name field through the cw2?td parameter, which then executes in the context of other users who view the affected page. This represents a classic cross-site scripting flaw that can be categorized under CWE-79 - Improper Neutralization of Input During Web Page Generation. The vulnerability exists because the device fails to properly escape or encode user input before incorporating it into dynamic web content, creating an opening for malicious code injection that can be exploited by remote attackers.
Operationally, this vulnerability presents a serious risk to network administrators and system operators who rely on the UHP-100 devices for critical infrastructure management. An attacker could potentially execute arbitrary JavaScript code in the context of authenticated users' browsers, enabling them to steal session cookies, perform unauthorized actions on behalf of users, or redirect victims to malicious sites. The impact extends beyond simple script execution as it could allow for complete browser compromise, particularly if the affected users have administrative privileges. This vulnerability aligns with ATT&CK technique T1531 - Establishing Persistence and T1213 - Data from Information Repositories, as it enables attackers to maintain access and potentially exfiltrate sensitive configuration data.
The exploitation of this vulnerability requires minimal prerequisites, as it operates through standard web interface interactions without requiring special privileges or complex attack chains. Attackers can craft malicious payloads containing JavaScript code that gets executed when other users browse to pages containing the compromised Site Name field. The persistent nature of this vulnerability means that once exploited, the malicious scripts continue to execute for all users who access the affected web interface until the device is properly patched or the malicious input is removed from the database.
Mitigation strategies should focus on immediate firmware updates from the vendor to address the root cause of the input validation failure. Organizations should also implement network segmentation to limit access to the affected devices and establish monitoring for suspicious web interface activity. Additional protective measures include implementing web application firewalls to detect and block XSS payloads, conducting regular security assessments of network infrastructure, and ensuring that all administrative interfaces are protected through strong authentication mechanisms. The vulnerability highlights the critical importance of input validation and output encoding in web applications, particularly in network infrastructure devices where unauthorized access can have severe operational consequences.