CVE-2017-10271 in WebLogic Server
Summary
by MITRE
Vulnerability in the Oracle WebLogic Server component of Oracle Fusion Middleware (subcomponent: WLS Security). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.1.0 and 12.2.1.2.0. 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 3.0 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
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Analysis
by VulDB Data Team • 08/13/2026
The CVE-2017-10271 vulnerability represents a critical security flaw in Oracle WebLogic Server that has significant implications for enterprise environments relying on this middleware platform. This vulnerability resides within the WLS Security subcomponent of Oracle Fusion Middleware, specifically affecting versions 10.3.6.0.0, 12.1.3.0.0, 12.2.1.1.0, and 12.2.1.2.0. The flaw manifests as an easily exploitable vulnerability that permits unauthenticated attackers to compromise the target server through network-based T3 protocol access. The CVSS 3.0 scoring system assigns this vulnerability a base score of 7.5, with the availability impact component carrying the highest weight at 8.2, indicating the severe potential for service disruption and system compromise.
The technical exploitation of this vulnerability occurs through the T3 protocol, which is Oracle WebLogic Server's proprietary protocol used for communication between servers and clients. Attackers can leverage this protocol to execute arbitrary code on the target server without requiring authentication credentials, making it particularly dangerous for environments where WebLogic servers are exposed to untrusted networks. The vulnerability stems from insufficient input validation and inadequate access controls within the WebLogic Server's T3 service implementation, allowing attackers to craft malicious requests that bypass normal security mechanisms. This flaw directly maps to CWE-20, which describes "Improper Input Validation" as the underlying weakness, and represents a classic example of a remote code execution vulnerability that can be exploited from outside the network perimeter.
The operational impact of CVE-2017-10271 extends beyond simple service disruption to encompass complete system compromise and potential lateral movement within affected networks. Successful exploitation can result in full administrative control over the WebLogic Server instance, enabling attackers to access sensitive data, modify applications, create backdoor accounts, or use the compromised server as a launching point for attacks against other systems. Organizations running affected WebLogic versions are particularly vulnerable because these servers often serve as critical infrastructure components hosting enterprise applications, databases, and business-critical services. The vulnerability's ability to operate without authentication makes it especially dangerous in environments where WebLogic servers are exposed to the internet or where network segmentation is inadequate.
Mitigation strategies for CVE-2017-10271 should prioritize immediate patching of affected systems with Oracle's security updates, as this vulnerability has been addressed through official patches released by Oracle. Organizations should also implement network segmentation to restrict access to WebLogic servers, disable the T3 protocol entirely where possible, and deploy network monitoring solutions to detect suspicious T3 traffic patterns. Additional protective measures include implementing strong firewall rules that restrict T3 protocol access to trusted IP addresses only, conducting regular vulnerability assessments, and establishing robust network access controls that align with the principle of least privilege. From an ATT&CK framework perspective, this vulnerability corresponds to techniques such as T1190 "Exploit Public-Facing Application" and T1059 "Command and Scripting Interpreter," as attackers can leverage the compromised server to execute commands and scripts. Organizations should also consider implementing intrusion detection systems that can identify and alert on exploitation attempts targeting this specific vulnerability, as the attack patterns are well-documented and recognizable within network traffic analysis tools.