CVE-2003-1442 in HM220dp ADSL Modem
Summary
by MITRE
The web administration page for the Ericsson HM220dp ADSL modem does not require authentication, which could allow remote attackers to gain access from the LAN side.
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Analysis
by VulDB Data Team • 09/12/2024
The CVE-2003-1442 vulnerability represents a critical security flaw in the Ericsson HM220dp ADSL modem's web administration interface that fundamentally undermines network security through improper access controls. This vulnerability exists within the device's web-based management system, which is designed to allow administrators to configure and monitor the modem's operational parameters. The flaw manifests as a complete absence of authentication mechanisms on the web administration page, creating an exploitable entry point that permits any local network user to access sensitive configuration interfaces without requiring valid credentials. This represents a severe violation of the principle of least privilege and demonstrates poor security design in network infrastructure devices that were prevalent during the early 2000s era.
The technical implementation of this vulnerability stems from the modem's web server component failing to enforce authentication checks before granting access to administrative functions. When users attempt to access the web administration page, the system does not validate user credentials, verify permissions, or implement any form of access control mechanism. This authentication bypass allows attackers to directly navigate to administrative interfaces and potentially modify critical network settings, including firewall rules, routing configurations, DNS settings, and user access controls. The vulnerability specifically affects the LAN-side access point, meaning that any device connected to the same local network segment can exploit this weakness without requiring external network connectivity or specialized tools. This characteristic makes the vulnerability particularly dangerous in shared network environments where multiple users have physical access to the network infrastructure.
The operational impact of CVE-2003-1442 extends beyond simple unauthorized access, creating potential pathways for significant network compromise and service disruption. Attackers who exploit this vulnerability can modify the modem's configuration to redirect traffic through malicious servers, disable security features, or establish backdoor access points that persist even after the initial compromise. The vulnerability enables man-in-the-middle attacks by allowing attackers to manipulate network routing and filtering rules, potentially intercepting or modifying data traffic flowing through the modem. From a broader security perspective, this vulnerability undermines the security posture of the entire local network, as the modem serves as a gateway device that controls traffic flow between internal and external networks. The absence of authentication mechanisms on a device that controls network access represents a fundamental security failure that aligns with CWE-284, which describes improper access control vulnerabilities in software systems. The threat landscape for such vulnerabilities is further amplified when considering that many organizations during this period lacked robust network segmentation and monitoring capabilities, making these devices prime targets for lateral movement within compromised networks.
Mitigation strategies for CVE-2003-1442 require immediate attention through multiple defensive layers that address both the immediate vulnerability and broader network security gaps. The most effective immediate solution involves disabling the web administration interface entirely if it is not required for operational purposes, as recommended by the ATT&CK framework's network infiltration tactics. Organizations should implement network segmentation to isolate critical infrastructure devices from general user access segments, ensuring that even if one device is compromised, the attacker cannot easily move laterally through the network. Network monitoring and intrusion detection systems should be configured to detect unusual access patterns to administrative interfaces, while regular security audits should verify that all network devices have appropriate access controls enabled. Device firmware updates should be prioritized to address known vulnerabilities, though in this case the vulnerability predates many modern security standards and requires manual configuration changes. Additionally, implementing network access control lists and ensuring that administrative interfaces are only accessible from trusted network segments helps reduce the attack surface. The vulnerability demonstrates the importance of the principle of defense in depth, where multiple security controls work together to protect against various attack vectors as outlined in the NIST cybersecurity framework and other industry standards.