CVE-2014-0337 in Echo Life
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the web interface on Huawei Echo Life HG8247 routers with software before V100R006C00SPC127 allows remote attackers to inject arbitrary web script or HTML via an invalid TELNET connection attempt with a crafted username that is not properly handled during construction of the "failed log-in attempts over telnet" log view.
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Analysis
by VulDB Data Team • 05/09/2026
The CVE-2014-0337 vulnerability represents a critical cross-site scripting flaw discovered in Huawei Echo Life HG8247 routers running firmware versions prior to V100R006C00SPC127. This vulnerability exists within the web interface component of the router's management system, specifically affecting how the device handles failed TELNET connection attempts. The flaw stems from inadequate input validation and sanitization mechanisms that fail to properly process user-supplied data during log view construction, creating an exploitable condition that allows remote attackers to execute malicious scripts within the context of the router's web interface.
The technical implementation of this vulnerability exploits the router's handling of malformed TELNET connection attempts. When an attacker attempts to establish a TELNET connection using a crafted username parameter, the router's web interface fails to properly sanitize this input before incorporating it into the log display for failed login attempts. This improper handling creates a classic XSS vector where malicious script code can be injected and subsequently executed when other users view the log entries. The vulnerability specifically targets the "failed log-in attempts over telnet" log view, making it particularly dangerous as administrators frequently monitor these logs for security events.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with a means to compromise the router's web interface and potentially escalate privileges. Remote attackers can leverage this vulnerability to execute arbitrary code within the context of the web browser accessing the router's management interface, potentially leading to full system compromise. The vulnerability affects not only the availability of the router's management functions but also its integrity and confidentiality, as attackers could manipulate log entries to hide malicious activities or redirect users to phishing sites. This weakness particularly impacts enterprise networks where router management interfaces are frequently accessed by multiple administrators, increasing the potential attack surface.
Mitigation strategies for CVE-2014-0337 should prioritize immediate firmware updates to version V100R006C00SPC127 or later, which contain proper input sanitization measures. Network administrators should also implement additional security controls such as disabling unnecessary web management interfaces, restricting access to router management functions through firewall rules, and implementing network segmentation to limit exposure. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws, and represents a common pattern in embedded device security where insufficient input validation leads to code execution vulnerabilities. From an ATT&CK perspective, this vulnerability maps to techniques involving web application exploitation and credential access, potentially enabling adversaries to establish persistent access to network infrastructure through compromised router management interfaces. Organizations should also consider implementing web application firewalls and regular security assessments of network infrastructure devices to identify similar vulnerabilities in other embedded systems.