CVE-2016-9870 in Isilon OneFS
Summary
by MITRE
EMC Isilon OneFS 8.0.0.0, EMC Isilon OneFS 7.2.1.0 - 7.2.1.2, EMC Isilon OneFS 7.2.0.x, EMC Isilon OneFS 7.1.1.0 - 7.1.1.10, and EMC Isilon OneFS 7.1.0.x is affected by an LDAP injection vulnerability that could potentially be exploited by a malicious user to compromise the system.
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Analysis
by VulDB Data Team • 05/14/2026
The vulnerability identified as CVE-2016-9870 represents a critical LDAP injection flaw affecting multiple versions of EMC Isilon OneFS storage operating systems. This vulnerability exists within the authentication and authorization mechanisms of the Isilon storage platform, which relies heavily on Lightweight Directory Access Protocol for user management and access control. The affected versions include OneFS 8.0.0.0, 7.2.1.0 through 7.2.1.2, 7.2.0.x, 7.1.1.0 through 7.1.1.10, and 7.1.0.x, indicating a widespread impact across the Isilon product line. The vulnerability stems from insufficient input validation and sanitization within the LDAP query processing components that handle user authentication requests.
The technical implementation of this vulnerability allows an attacker to inject malicious LDAP query syntax into authentication requests, potentially bypassing normal authentication mechanisms and gaining unauthorized access to the storage system. When the system processes user login requests, it constructs LDAP queries based on user input without proper sanitization, enabling attackers to manipulate the query structure. This injection could permit unauthorized users to authenticate as legitimate system users, escalate privileges, or access sensitive data stored within the Isilon environment. The flaw specifically impacts the LDAP authentication module that interfaces with directory services, where user credentials are verified against directory servers. According to CWE classification, this vulnerability maps to CWE-91, which describes improper neutralization of special elements used in an LDAP query, making it a direct implementation of LDAP injection patterns that have been documented in numerous security advisories.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it could enable attackers to establish persistent access to the storage infrastructure, potentially leading to data exfiltration, modification of stored data, or disruption of storage services. An attacker exploiting this vulnerability could compromise the integrity and confidentiality of data stored on the Isilon system, particularly if the storage environment contains sensitive corporate information, personal data, or regulated content. The vulnerability is particularly dangerous because it affects the core authentication infrastructure of the storage platform, potentially allowing attackers to move laterally within the network if the Isilon system is integrated with other enterprise services that rely on the same directory services. This type of vulnerability aligns with ATT&CK technique T1078.002, which describes valid accounts used for persistence, as successful exploitation could provide attackers with legitimate credentials to maintain access.
Organizations affected by this vulnerability should implement immediate mitigations including applying the vendor-provided security patches, disabling unnecessary LDAP authentication methods, and implementing network segmentation to limit access to the Isilon storage systems. Security monitoring should focus on detecting anomalous authentication patterns and LDAP query syntax that may indicate exploitation attempts. The vulnerability also highlights the importance of proper input validation and parameterized queries in authentication systems, aligning with industry best practices from NIST SP 800-163 and OWASP Top 10 security guidelines. Additionally, organizations should conduct thorough security assessments of their directory service integrations and implement multi-factor authentication mechanisms to reduce the impact of credential compromise. Regular security audits and vulnerability scanning should include specific checks for LDAP injection vulnerabilities in all directory service integrations across the enterprise infrastructure.