CVE-2008-1995 in Java System Directory Server
Summary
by MITRE
Sun Java System Directory Proxy Server 6.0, 6.1, and 6.2 classifies a connection using the "bind-dn" criteria, which can cause an incorrect application of policy and allows remote attackers to bypass intended access restrictions for the server.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/09/2019
The vulnerability identified as CVE-2008-1995 affects Sun Java System Directory Proxy Server versions 6.0, 6.1, and 6.2 where the authentication mechanism incorrectly processes connections using the "bind-dn" criteria. This flaw resides in the server's access control policy enforcement system and represents a significant security weakness that directly impacts the integrity of the authentication framework. The issue stems from how the server evaluates bind operations when determining access permissions, creating a scenario where legitimate access restrictions can be circumvented through crafted authentication requests.
The technical implementation of this vulnerability involves the server's failure to properly validate or classify authentication connections when the bind-dn parameter is utilized. This misclassification allows attackers to manipulate the authentication flow in such a way that their requests are processed under incorrect policy contexts. The flaw specifically manifests when the server's policy engine fails to properly distinguish between different authentication scenarios based on the bind-dn criteria, leading to improper access control decisions. This represents a classic case of insufficient authorization checks and improper privilege management within the directory service infrastructure.
From an operational impact perspective, this vulnerability creates a serious risk for organizations relying on Sun Java System Directory Proxy Server for access control and directory services. Remote attackers can exploit this weakness to bypass intended access restrictions, potentially gaining unauthorized access to directory resources that should be protected. The implications extend beyond simple unauthorized access, as this vulnerability could enable attackers to escalate privileges, access sensitive directory information, or manipulate directory entries. The remote nature of the attack means that adversaries do not require physical access to the server or local network connectivity to exploit this weakness, making it particularly dangerous in distributed environments.
The vulnerability aligns with CWE-284, which addresses improper access control issues, and demonstrates characteristics consistent with the attack pattern described in the MITRE ATT&CK framework under privilege escalation and defense evasion techniques. Organizations utilizing these server versions face a significant risk of unauthorized access to directory services, which could lead to data breaches, privilege abuse, or complete compromise of directory-based authentication systems. The impact is particularly severe given that directory servers typically serve as critical infrastructure components for authentication and authorization within enterprise environments, making this vulnerability a high-priority concern for security administrators.
Mitigation strategies should focus on immediate patching of affected server versions, as Sun Microsystems released updates specifically addressing this vulnerability. Network segmentation and access controls should be implemented to limit exposure of affected servers to untrusted networks. Additionally, organizations should conduct thorough audits of their directory service configurations to identify and correct any improper access control policies that might compound the vulnerability's impact. Monitoring for unauthorized access attempts and implementing robust logging of authentication events becomes critical for detecting exploitation attempts. Security teams should also consider implementing additional authentication layers or alternative access control mechanisms to provide defense-in-depth against potential exploitation of this and similar vulnerabilities.