CVE-2016-5754 in Access Manager
Summary
by MITRE
Presence of a .htaccess file could leak information in NetIQ Access Manager 4.1 before 4.1.2 Hot Fix 1 and 4.2 before SP2.
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Analysis
by VulDB Data Team • 09/11/2020
The vulnerability identified as CVE-2016-5754 represents a critical information disclosure flaw within NetIQ Access Manager software versions prior to specific hotfixes and service packs. This issue stems from the improper configuration of web server access control mechanisms through the presence of a malicious or misconfigured .htaccess file that inadvertently exposes sensitive system information to unauthorized users. The vulnerability affects both NetIQ Access Manager 4.1 versions before 4.1.2 Hot Fix 1 and 4.2 versions before SP2, indicating a widespread impact across multiple release lines of the software. The .htaccess file mechanism, commonly used in apache web servers for directory-level configuration, becomes a vector for information leakage when not properly secured or validated within the access management framework.
The technical root cause of this vulnerability lies in the inadequate handling of access control directives within the web server configuration files, specifically how the .htaccess file interacts with the application's authentication and authorization mechanisms. When an attacker can manipulate or inject a .htaccess file into the web application's directory structure, they gain the ability to control access permissions and potentially expose internal system paths, configuration details, or other sensitive metadata that should remain protected within the access management environment. This flaw operates at the intersection of web server configuration management and application security controls, where improper validation of file upload or modification capabilities allows malicious actors to escalate their privileges and access restricted information.
The operational impact of this vulnerability extends beyond simple information disclosure, as the leaked information could provide attackers with valuable insights for subsequent exploitation attempts. The leaked data might include system paths, application version details, internal network structures, or configuration parameters that could be leveraged in combination with other vulnerabilities to compromise the entire access management infrastructure. This information leakage represents a significant threat to the security posture of organizations relying on NetIQ Access Manager, as it undermines the fundamental security assumptions of the system and potentially exposes the underlying authentication mechanisms to more sophisticated attacks. The vulnerability aligns with CWE-200, which addresses information exposure through improper error handling or configuration management, and can be mapped to ATT&CK technique T1083 for discovery of system information and T1566 for credential access through information gathering.
Organizations affected by CVE-2016-5754 should immediately implement mitigations including the mandatory installation of NetIQ's 4.1.2 Hot Fix 1 and 4.2 SP2 updates, which contain the necessary patches to address the .htaccess file handling vulnerability. Additional defensive measures should include implementing strict file upload validation controls, disabling unnecessary .htaccess file processing capabilities, and conducting comprehensive security audits of web server configurations to ensure no unauthorized access control files exist in the application directories. Network monitoring should be enhanced to detect unusual access patterns or attempts to modify web server configuration files, while access controls should be reviewed and hardened to prevent unauthorized modification of critical system files. The remediation process should also include regular security assessments to identify and eliminate any other potential configuration vulnerabilities that could similarly expose sensitive information within the access management environment.