CVE-2015-7247 in DVGN5402SP
Summary
by MITRE
DLink DVGN5402SP with firmware W1000CN00, W1000CN03, or W2000EN00 discloses usernames, passwords, keys, values, and web account hashes (super and admin) in plaintext when running a configuration backup, which allows remote attackers to obtain sensitive information.
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Analysis
by VulDB Data Team • 06/20/2024
The CVE-2015-7247 vulnerability affects DLink DVGN5402SP routers running specific firmware versions including W1000CN00, W1000CN03, and W2000EN00. This critical security flaw stems from improper handling of configuration data during backup operations, where sensitive authentication credentials are exposed in plaintext format. The vulnerability represents a significant weakness in the router's security architecture, as it allows unauthenticated remote attackers to access critical system information through a simple configuration backup process that should remain secure.
The technical implementation of this vulnerability involves the router's configuration backup functionality failing to properly encrypt or obfuscate sensitive data elements including usernames, passwords, cryptographic keys, system values, and web account hashes for both super and admin user accounts. When a configuration backup is initiated, the system dumps this sensitive information in plaintext format within the backup file, making it immediately accessible to any attacker who can intercept or access the backup data. This flaw directly violates security principles of least privilege and proper credential handling, as the system exposes authentication materials that should remain protected even during administrative operations.
The operational impact of CVE-2015-7247 is severe and multifaceted, as it provides attackers with comprehensive access to router administrative capabilities. Remote attackers can leverage this information to gain full control over the affected routers, potentially leading to man-in-the-middle attacks, network infiltration, data exfiltration, and lateral movement within compromised networks. The vulnerability affects not only the router's own security but also creates potential risks for connected devices and network infrastructure. According to CWE classification, this vulnerability maps to CWE-312, which addresses "Cleartext Storage of Sensitive Information," and aligns with ATT&CK technique T1078 for Valid Accounts and T1566 for Phishing, as attackers can use the stolen credentials for further exploitation.
Mitigation strategies for this vulnerability require immediate firmware updates from DLink to address the configuration backup flaw and ensure proper encryption of sensitive data elements. Network administrators should implement additional security measures including network segmentation, monitoring for unauthorized backup file access, and regular security assessments of network devices. The vulnerability also highlights the importance of secure configuration management practices and the need for organizations to maintain up-to-date firmware across all network infrastructure components. Organizations should conduct comprehensive vulnerability assessments to identify other devices potentially affected by similar credential exposure issues and implement network access controls to limit exposure of sensitive configuration data.