CVE-2008-0893 in Directory Server
Summary
by MITRE
Red Hat Administration Server, as used by Red Hat Directory Server 8.0 EL4 and EL5, does not properly restrict access to CGI scripts, which allows remote attackers to perform administrative actions.
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Analysis
by VulDB Data Team • 08/09/2019
The vulnerability identified as CVE-2008-0893 affects the Red Hat Administration Server component within Red Hat Directory Server 8.0 EL4 and EL5 versions, representing a critical access control flaw that undermines the security posture of directory services. This issue stems from improper restrictions on CGI script access within the administrative interface, creating a pathway for unauthorized remote exploitation. The flaw exists in the server's permission model where administrative CGI scripts are accessible without proper authentication mechanisms, allowing malicious actors to execute privileged operations through crafted HTTP requests.
The technical implementation of this vulnerability resides in the web server configuration and access control mechanisms of the Red Hat Administration Server. When users interact with the administrative interface, the system should enforce strict authentication and authorization checks before permitting access to CGI scripts that perform administrative functions such as user management, configuration changes, or system modifications. However, the flaw allows attackers to bypass these controls by directly accessing CGI endpoints without proper credentials, effectively granting them administrative privileges without legitimate authorization. This represents a classic case of insufficient authorization checking, which maps to CWE-285 in the Common Weakness Enumeration catalog.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables remote attackers to execute arbitrary administrative commands on the target system. Attackers can leverage this weakness to modify directory configurations, create or delete user accounts, change system settings, or potentially escalate their privileges to gain deeper system access. The remote nature of the exploit means that attackers do not require physical access to the system or network proximity, making the vulnerability particularly dangerous in networked environments. This aligns with ATT&CK technique T1078 which describes legitimate credentials used for persistence and privilege escalation.
Organizations running affected Red Hat Directory Server versions face significant security risks including potential data breaches, system compromise, and unauthorized modifications to directory services. The vulnerability particularly impacts enterprises that rely on directory services for user authentication, identity management, and access control across their infrastructure. Attackers can exploit this weakness to gain unauthorized access to sensitive organizational data stored within directory services, potentially leading to broader security incidents. The impact is amplified when considering that directory servers often serve as central points of authentication for multiple systems and applications within an enterprise environment.
Mitigation strategies for CVE-2008-0893 should focus on implementing proper access controls and authentication mechanisms for CGI scripts within the Red Hat Administration Server. System administrators should immediately apply security patches released by Red Hat to address this vulnerability, ensuring that all affected systems are updated to versions that properly enforce authorization checks for administrative CGI endpoints. Additionally, network segmentation and firewall rules should be implemented to restrict access to administrative interfaces, limiting exposure to trusted networks only. The implementation of multi-factor authentication for administrative access and regular security audits of web server configurations can further reduce the risk of exploitation. Organizations should also consider implementing intrusion detection systems to monitor for suspicious access patterns targeting administrative interfaces, as this vulnerability may be exploited as part of broader attack campaigns targeting directory services.