CVE-2018-12469 in Enterprise Developer
Summary
by MITRE
Incorrect handling of an invalid value for an HTTP request parameter by Directory Server (aka Enterprise Server Administration web UI) in Micro Focus Enterprise Developer and Enterprise Server 2.3 Update 2 and earlier, 3.0 before Patch Update 12, and 4.0 before Patch Update 2 causes a null pointer dereference (CWE-476) and subsequent denial of service due to process termination.
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Analysis
by VulDB Data Team • 04/02/2020
The vulnerability identified as CVE-2018-12469 represents a critical security flaw in Micro Focus Enterprise Developer and Enterprise Server web administration interfaces. This issue manifests through improper validation of HTTP request parameters within the Directory Server component, specifically affecting versions 2.3 Update 2 and earlier, 3.0 before Patch Update 12, and 4.0 before Patch Update 2. The flaw constitutes a null pointer dereference condition classified under CWE-476, which occurs when an application attempts to access a memory location through a null pointer reference. This particular vulnerability resides in the web user interface responsible for enterprise server administration, making it a prime target for exploitation in environments where administrative access is required.
The technical implementation of this vulnerability stems from inadequate input validation mechanisms within the HTTP request processing pipeline. When an attacker crafts a malicious HTTP request containing an invalid parameter value, the Directory Server fails to properly handle this malformed input, leading to a null pointer dereference during request processing. This condition causes the affected process to terminate unexpectedly, resulting in a denial of service condition that impacts the availability of the administrative web interface. The vulnerability's impact extends beyond simple service disruption as it affects the core administrative functionality of the enterprise server platform, potentially preventing legitimate administrators from performing critical system management tasks.
From an operational perspective, this vulnerability poses significant risks to enterprise environments that rely on the affected Micro Focus products for critical business operations. The denial of service condition can disrupt administrative workflows, prevent system maintenance activities, and potentially impact business continuity if the affected system serves as a central management point for enterprise infrastructure. The vulnerability's exploitation requires minimal technical expertise, as it can be triggered through standard HTTP request manipulation techniques, making it particularly dangerous in environments where unauthorized access attempts are common. Security professionals should note that this issue aligns with ATT&CK technique T1499.004, which covers network denial of service attacks, and represents a classic example of how improper input validation can lead to process termination and service disruption.
The recommended mitigation strategies for CVE-2018-12469 focus primarily on applying the vendor-provided patches and updates for the affected versions. Organizations should immediately upgrade to the patched versions of Micro Focus Enterprise Developer and Enterprise Server, specifically targeting versions that include Patch Update 12 for 3.0 and Patch Update 2 for 4.0. Network administrators should also consider implementing additional protective measures such as web application firewalls that can detect and block malformed HTTP requests before they reach the vulnerable application components. Input validation controls should be strengthened at the application level to ensure that all HTTP parameters are properly sanitized and validated before processing. Additionally, monitoring systems should be configured to detect unusual patterns of request failures or process terminations that may indicate exploitation attempts. The vulnerability's classification as CWE-476 emphasizes the need for robust pointer validation and error handling mechanisms throughout the application codebase, particularly in components that handle external input from HTTP requests.