CVE-2018-2894 in WebLogic Server
Summary
by MITRE
Vulnerability in the Oracle WebLogic Server component of Oracle Fusion Middleware (subcomponent: WLS - Web Services). Supported versions that are affected are 12.1.3.0, 12.2.1.2 and 12.2.1.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.0 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 04/10/2023
The CVE-2018-2894 vulnerability represents a critical security flaw in Oracle WebLogic Server that has significant implications for enterprise infrastructure security. This vulnerability specifically affects the Web Services component within the WLS subcomponent of Oracle Fusion Middleware, impacting versions 12.1.3.0, 12.2.1.2, and 12.2.1.3. The vulnerability operates at the network level and requires no authentication for exploitation, making it particularly dangerous for organizations with exposed weblogic servers. The CVSS 3.0 score of 9.8 indicates a high severity rating with impacts across confidentiality, integrity, and availability, reflecting the potential for complete system compromise.
The technical nature of this vulnerability stems from improper input validation within the WebLogic Server's web services implementation. Attackers can exploit this flaw through HTTP network connections without requiring any credentials or prior access to the system. The vulnerability allows for remote code execution capabilities that can lead to complete system takeover, enabling attackers to gain full control over the affected WebLogic server instance. This type of vulnerability falls under CWE-20, which addresses "Improper Input Validation," specifically in the context of web services processing where insufficient validation of incoming requests can lead to arbitrary code execution.
The operational impact of CVE-2018-2894 extends far beyond simple system compromise, as it provides attackers with a pathway to establish persistent access to enterprise networks through the compromised WebLogic server. Organizations running affected versions face risks including data breaches, system downtime, and potential lateral movement within their network infrastructure. The vulnerability's ease of exploitation means that attackers can quickly identify and compromise vulnerable systems, making it a prime target for automated attack tools and botnets. The availability impact is particularly severe as attackers can render services completely inaccessible through various attack vectors including denial of service conditions or complete system takeover.
Security professionals should implement immediate mitigations including applying Oracle's security patches, implementing network segmentation to limit exposure, and deploying intrusion detection systems to monitor for exploitation attempts. The vulnerability aligns with ATT&CK technique T1190, which covers "Exploit Public-Facing Application," and T1059, which covers "Command and Scripting Interpreter," as attackers can leverage this vulnerability to execute commands and establish persistence. Organizations should also consider implementing web application firewalls and monitoring for unusual HTTP traffic patterns that might indicate exploitation attempts. Regular vulnerability assessments and patch management processes become critical for maintaining security posture against similar vulnerabilities in enterprise applications.