CVE-2003-0216 in CatOS
Summary
by MITRE
Unknown vulnerability in Cisco Catalyst 7.5(1) allows local users to bypass authentication and gain access to the enable mode without a password.
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Analysis
by VulDB Data Team • 07/15/2024
The vulnerability identified as CVE-2003-0216 represents a critical authentication bypass flaw within Cisco Catalyst switches running software version 7.5(1). This issue affects network infrastructure devices that are fundamental to enterprise and organizational network operations, creating a significant security risk that could allow unauthorized local access to privileged system functions. The vulnerability specifically targets the enable mode authentication mechanism, which is a core component of Cisco IOS security architecture that typically requires proper credentials to access administrative functions. This weakness fundamentally undermines the security model of the affected network equipment, potentially enabling malicious actors with physical or local network access to escalate privileges without proper authentication.
The technical flaw manifests as a failure in the authentication validation process within the Cisco Catalyst switch operating system. When attempting to access the enable mode, the system should enforce proper credential verification before granting administrative privileges. However, due to this vulnerability, local users can bypass this critical security check and gain immediate access to the enable mode without providing any password or authentication credentials. This represents a fundamental breakdown in the principle of least privilege and authentication controls that are essential for network device security. The vulnerability likely stems from improper input validation or flawed privilege management within the IOS kernel, potentially involving issues with command parsing or access control list enforcement.
The operational impact of this vulnerability extends far beyond simple unauthorized access, as it provides attackers with complete administrative control over affected network switches. Once an attacker gains access to enable mode, they can modify network configurations, implement man-in-the-middle attacks, redirect traffic, disable security features, or establish persistent backdoors within the network infrastructure. This level of access can result in complete network compromise, data exfiltration, service disruption, and potential lateral movement throughout the organization's network. The local nature of the attack means that physical access to the device or network access that allows local execution is sufficient for exploitation, making it particularly dangerous in environments where such access might be possible. Organizations using affected Cisco Catalyst switches face significant risk of network infiltration and potential data breaches.
Mitigation strategies for CVE-2003-0216 should prioritize immediate software updates to address the vulnerability, with Cisco releasing patches and updated firmware versions to resolve the authentication bypass issue. Network administrators should implement additional security controls including disabling unnecessary services, implementing strong physical security measures, and establishing robust network access controls to limit local access to critical network equipment. The vulnerability aligns with CWE-284, which addresses improper access control, and may relate to ATT&CK techniques involving privilege escalation and credential access. Organizations should also consider implementing network segmentation, monitoring for unauthorized configuration changes, and establishing incident response procedures to detect and respond to potential exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify and remediate similar issues within the network infrastructure.