CVE-2014-3428 in VoIP Phone
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Yealink VoIP Phones with firmware 28.72.0.2 allows remote attackers to inject arbitrary web script or HTML via the model parameter to servlet.
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Analysis
by VulDB Data Team • 03/22/2022
The CVE-2014-3428 vulnerability represents a critical cross-site scripting flaw discovered in Yealink VoIP phones running firmware version 28.72.0.2 and potentially other affected versions. This vulnerability resides within the web interface of these telephony devices, specifically in how the system processes the model parameter through the servlet component. The flaw enables remote attackers to execute malicious scripts within the context of the victim's browser session, creating a significant security risk for organizations relying on these communication devices.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the Yealink phone's web server component. When the device receives a request containing a crafted model parameter through the servlet interface, it fails to properly sanitize or escape the input before incorporating it into dynamic web content. This allows attackers to inject malicious HTML or JavaScript code that executes in the browser of any user who views the affected page. The vulnerability is classified as a reflected XSS attack since the malicious payload is reflected back to the user through the device's web interface without being stored on the server.
From an operational perspective, this vulnerability poses severe risks to enterprise communication networks and can be exploited to compromise the security of VoIP infrastructure. An attacker could leverage this flaw to steal session cookies, redirect users to malicious websites, or even execute arbitrary commands within the phone's web interface. The impact extends beyond simple data theft, as compromised VoIP devices could serve as entry points for broader network infiltration, potentially allowing attackers to access internal communication channels and sensitive business data. This vulnerability particularly affects organizations using Yealink phones in environments where network segmentation is insufficient or where users have elevated privileges within the communication infrastructure.
Organizations should implement immediate mitigations including firmware updates from Yealink to address the vulnerability, network segmentation to isolate VoIP devices from general network traffic, and the implementation of web application firewalls to filter malicious requests. The vulnerability aligns with CWE-79 which describes improper neutralization of input during web page generation, and relates to ATT&CK technique T1059.007 for scripting languages. Additional protective measures include disabling unnecessary web interfaces, implementing strict access controls, and conducting regular security assessments of VoIP infrastructure to identify similar vulnerabilities that may exist in other telephony equipment or network components.