CVE-2004-2481 in myproxy
Summary
by MITRE
myproxy 6.58 allows remote authenticated users in the users tab to connect to arbitrary hosts from the myproxy server possibly bypassing access restrictions by connecting to the proxy and issuing a connect command.
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Analysis
by VulDB Data Team • 06/29/2018
The vulnerability described in CVE-2004-2481 affects myproxy version 6.58, a distributed credential management system designed to provide secure authentication and authorization services. This flaw resides within the access control mechanisms of the myproxy server implementation, specifically within the user tab functionality that governs how authenticated users can interact with the proxy system. The vulnerability represents a significant security weakness that allows remote authenticated users to circumvent intended access restrictions and connect to arbitrary hosts through the proxy server.
The technical flaw manifests in the improper validation of connection requests issued through the myproxy proxy interface. When authenticated users submit connect commands to the myproxy server, the system fails to properly verify whether the target host and port are authorized for access. This allows malicious actors who have gained legitimate authentication credentials to exploit the system's trust model and establish connections to systems that should be restricted. The vulnerability specifically impacts the users tab functionality where access control policies are enforced, creating a pathway for unauthorized network access that bypasses normal security boundaries.
The operational impact of this vulnerability is severe as it enables attackers to potentially access sensitive systems and data that should be protected by the myproxy access control framework. Remote authenticated users can leverage this flaw to establish connections to arbitrary hosts, effectively bypassing network segmentation and firewall rules that are typically enforced by the proxy system. This could lead to unauthorized data access, lateral movement within networks, and potential compromise of systems that are supposed to be isolated from direct network access. The vulnerability undermines the fundamental security model of the myproxy system by allowing privilege escalation through legitimate access channels.
This vulnerability aligns with CWE-284, which addresses improper access control issues in software systems, and demonstrates weaknesses in the authorization mechanisms of the myproxy server. From an ATT&CK perspective, this vulnerability maps to techniques involving privilege escalation and lateral movement through proxy systems, specifically covering tactics such as T1078 for valid accounts and T1021 for remote services. The flaw represents a classic case of insufficient input validation and access control enforcement, where the system assumes that authenticated users can access any resource they request without proper authorization checks. Organizations using myproxy 6.58 should implement immediate mitigations including patching to newer versions, implementing additional access control layers, and monitoring for unauthorized connection attempts to prevent exploitation of this vulnerability.