CVE-2022-21306 in WebLogic Server
Summary
by MITRE • 01/19/2022
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3 to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/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 • 01/23/2022
The vulnerability identified as CVE-2022-21306 represents a critical security flaw within Oracle WebLogic Server's Core component, specifically affecting versions 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0. This vulnerability resides within Oracle Fusion Middleware and demonstrates the dangerous potential of unauthenticated remote exploitation through the T3 protocol, which is Oracle's proprietary protocol for communication between WebLogic Server instances and clients. The flaw's classification as easily exploitable indicates that attackers can leverage this vulnerability without requiring authentication credentials, making it particularly dangerous for organizations that expose their WebLogic servers to untrusted networks.
The technical nature of this vulnerability stems from insufficient input validation and authentication mechanisms within the WebLogic Server's T3 protocol implementation. Attackers can exploit this weakness by establishing a connection through the T3 protocol without providing valid credentials, allowing them to execute arbitrary code on the target server. This type of vulnerability aligns with CWE-284, which addresses improper access control issues, and specifically relates to the lack of proper authentication checks that should occur during T3 protocol communication. The attack vector through T3 protocol access represents a fundamental breakdown in the server's security model, as it enables attackers to bypass normal authentication mechanisms and directly compromise the server's core functionality.
The operational impact of this vulnerability extends far beyond simple data theft, as successful exploitation can lead to complete server compromise and potential lateral movement within the target network. CVSS 3.1 scoring of 9.8 reflects the high severity and the comprehensive nature of the potential damage, with all three impact vectors - confidentiality, integrity, and availability - rated as high. An attacker who successfully exploits this vulnerability gains full control over the WebLogic Server instance, potentially allowing them to access sensitive enterprise data, modify critical applications, or disrupt business operations entirely. The compromised server could serve as a launching point for further attacks against other systems within the organization's infrastructure, making this vulnerability particularly dangerous in enterprise environments where WebLogic servers often serve as central components of business-critical applications.
Organizations affected by this vulnerability should prioritize immediate remediation through Oracle's security patches, as the lack of authentication requirements makes this flaw extremely difficult to defend against through traditional network security measures. The recommended mitigations include applying the relevant Oracle Critical Patch Updates (CPU) and implementing network-level restrictions that limit access to the T3 protocol ports, though this approach may impact legitimate administrative operations. Security teams should also consider implementing network segmentation, intrusion detection systems, and monitoring for unusual T3 protocol activity to detect potential exploitation attempts. According to ATT&CK framework, this vulnerability maps to T1190 (Exploit Public-Facing Application) and T1071.004 (Application Layer Protocol: DNS), as attackers may use these methods to establish initial access and maintain persistence within the compromised environment, making comprehensive monitoring and response procedures essential for organizations that continue to operate vulnerable WebLogic Server instances.