CVE-1999-0186 in Solaris
Summary
by MITRE
In Solaris, an SNMP subagent has a default community string that allows remote attackers to execute arbitrary commands as root, or modify system parameters.
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Analysis
by VulDB Data Team • 06/23/2021
The vulnerability described in CVE-1999-0186 represents a critical security flaw within the Solaris operating system's implementation of the Simple Network Management Protocol. This issue specifically targets the SNMP subagent component that runs as part of the Solaris network management infrastructure. The vulnerability arises from the inclusion of a default community string that is poorly configured and accessible to remote attackers without proper authentication mechanisms. The default community string serves as a weak credential that allows unauthorized access to the system's management interfaces, creating a significant attack surface for malicious actors seeking to compromise Solaris systems.
The technical flaw stems from the improper configuration of SNMP community strings within the Solaris subagent implementation. According to CWE-798, this vulnerability falls under the category of using hardcoded credentials that should never be present in production systems. The default community string provides full administrative privileges to remote attackers, enabling them to execute arbitrary commands with root-level privileges or modify critical system parameters. This configuration error directly violates fundamental security principles of least privilege and proper access control implementation. The vulnerability exists because the system administrators did not properly secure or change the default credentials during the initial system setup, leaving the door open for remote exploitation.
The operational impact of this vulnerability is severe and far-reaching for organizations running Solaris systems. Remote attackers can leverage this flaw to gain complete control over affected systems, potentially leading to data breaches, system compromise, and full network infiltration. The ability to execute arbitrary commands as root provides attackers with unrestricted access to system resources, file systems, and network interfaces. Additionally, the capability to modify system parameters allows for persistent backdoor installation, configuration changes that could disrupt services, and potential data exfiltration. This vulnerability essentially provides a complete compromise path for any attacker who can reach the SNMP port on the affected system, making it particularly dangerous in networked environments where such services are exposed to external networks.
Mitigation strategies for CVE-1999-0186 should focus on immediate credential management and network segmentation. Organizations must immediately change the default SNMP community strings to strong, unique values that are properly secured and managed through established credential management practices. Network administrators should implement proper firewall rules to restrict access to SNMP ports to trusted networks only, following the principle of least privilege and network segmentation guidelines. The implementation should include disabling SNMP if it is not required for network management purposes, as outlined in various security frameworks including the NIST Cybersecurity Framework. Regular security audits should verify that no default credentials remain in place, and system hardening procedures should be implemented to ensure that all default configurations are reviewed and secured. This vulnerability demonstrates the critical importance of proper initial system configuration and the dangers of leaving default security settings in place, particularly in enterprise environments where network exposure is common. The attack surface can be significantly reduced by implementing proper network access controls and ensuring that all default credentials are changed during the initial deployment phase.