CVE-2024-20490 in Data Center Network Manager
Summary
by MITRE • 10/02/2024
A vulnerability in a logging function of Cisco Nexus Dashboard Fabric Controller (NDFC) and Cisco Nexus Dashboard Orchestrator (NDO) could allow an attacker with access to a tech support file to view sensitive information.
This vulnerability exists because HTTP proxy credentials could be recorded in an internal log that is stored in the tech support file. An attacker could exploit this vulnerability by accessing a tech support file that is generated from an affected system. A successful exploit could allow the attacker to view HTTP proxy server admin credentials in clear text that are configured on Nexus Dashboard to reach an external network. Note: Best practice is to store debug logs and tech support files safely and to share them only with trusted parties because they may contain sensitive information.
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Analysis
by VulDB Data Team • 10/05/2024
The vulnerability identified as CVE-2024-20490 resides within the logging mechanisms of Cisco Nexus Dashboard Fabric Controller (NDFC) and Cisco Nexus Dashboard Orchestrator (NDO) platforms, representing a critical security flaw that exposes sensitive authentication credentials through improper logging practices. This issue specifically affects the handling of HTTP proxy credentials within internal system logs that are subsequently included in tech support file generation processes. The vulnerability stems from the insecure storage of authentication information in log files that are not properly sanitized or protected, creating an avenue for unauthorized information disclosure.
Technical exploitation of this vulnerability requires an attacker to gain access to a tech support file generated by an affected system, which inherently contains the problematic log entries. The flaw manifests when HTTP proxy server administrator credentials are recorded in clear text within internal logs that are automatically included in the tech support file output. This represents a direct violation of security best practices for credential handling and log management, as sensitive authentication data should never be stored in plaintext within system artifacts that may be shared or accessed by unauthorized parties. The vulnerability aligns with CWE-312 (Cleartext Storage of Sensitive Information) and CWE-532 (Insertion of Sensitive Information into Log File) categories, demonstrating poor security design in the logging subsystem.
The operational impact of this vulnerability extends beyond simple credential exposure, as it potentially enables attackers to establish persistent access to external network resources through the compromised proxy credentials. Once obtained, these administrative credentials could be used to bypass network security controls, access restricted resources, or establish unauthorized communication channels with external systems. The vulnerability particularly affects organizations that rely on proxy configurations for external network access, as the compromised credentials could provide attackers with unrestricted access to corporate network resources. This threat vector aligns with ATT&CK technique T1078.002 (Additional Cloud Credentials) and T1566.001 (Phishing for Information) when considering the potential for credential theft through compromised support files.
Mitigation strategies for this vulnerability should prioritize immediate implementation of secure logging practices, including the removal or encryption of authentication credentials from log files before tech support file generation. Organizations must enforce strict access controls on tech support file generation and distribution processes, ensuring that these artifacts are only accessible to authorized personnel with legitimate operational requirements. The implementation of automated log sanitization procedures and regular security reviews of logging configurations will help prevent similar vulnerabilities from emerging in the future. Additionally, organizations should conduct comprehensive security awareness training for system administrators regarding the risks associated with sharing system artifacts and the importance of proper credential management practices.