CVE-2016-8779 in FusionAccess
Summary
by MITRE
Huawei FusionAccess with software V100R005C10 and V100R005C20 could allow remote attackers with specific permission to inject a Lightweight Directory Access Protocol (LDAP) operation command into a specific input variable to obtain sensitive information from the database.
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Analysis
by VulDB Data Team • 11/24/2022
The vulnerability identified as CVE-2016-8779 affects Huawei FusionAccess virtual desktop infrastructure software versions V100R005C10 and V100R005C20, representing a critical security flaw that enables unauthorized information disclosure through LDAP injection techniques. This vulnerability resides within the authentication and directory services component of the FusionAccess platform, which is designed to provide secure virtual desktop access for enterprise environments. The flaw specifically manifests when the system processes user input containing LDAP operation commands within a designated input variable, creating a pathway for malicious actors to extract sensitive data from underlying database systems.
The technical exploitation of this vulnerability follows a classic injection attack pattern where an attacker with specific permissions can manipulate input validation mechanisms to inject malicious LDAP commands. This type of vulnerability maps directly to CWE-91 and CWE-90, which address improper neutralization of special elements used in LDAP queries and improper neutralization of special elements used in SQL queries respectively. The attack vector requires an attacker to possess legitimate credentials or specific access privileges within the FusionAccess environment, making this a privilege escalation vulnerability that can be leveraged to gain unauthorized access to sensitive information stored in the backend database systems.
The operational impact of CVE-2016-8779 extends beyond simple information disclosure, as it represents a fundamental weakness in the identity management and authentication infrastructure of enterprise virtual desktop environments. Organizations utilizing Huawei FusionAccess systems could face significant security breaches where user credentials, authentication tokens, and other sensitive directory information become accessible to unauthorized parties. The vulnerability particularly affects enterprise environments where FusionAccess is deployed for remote access and virtual desktop services, potentially compromising large-scale user bases and sensitive corporate data repositories. Attackers could leverage this vulnerability to escalate privileges and access additional systems within the network infrastructure, as the compromised directory services often serve as entry points to broader enterprise networks.
Mitigation strategies for this vulnerability should include immediate software patching to address the identified LDAP injection flaw in Huawei FusionAccess versions V100R005C10 and V100R005C20. Organizations must implement comprehensive input validation mechanisms to prevent LDAP command injection attacks, including strict sanitization of all user inputs and proper escaping of special characters in LDAP queries. Network segmentation and access control measures should be strengthened to limit the potential impact of successful exploitation, while monitoring systems should be enhanced to detect anomalous LDAP query patterns that may indicate injection attempts. Security configurations should enforce least privilege principles and implement multi-factor authentication for administrative access to the FusionAccess systems, as outlined in the mitre attack framework under techniques related to credential access and privilege escalation. The vulnerability also highlights the importance of secure coding practices and regular security assessments of enterprise infrastructure components to prevent similar injection vulnerabilities from compromising organizational security postures.