CVE-2017-3241 in Java SE
Summary
by MITRE
Vulnerability in the Java SE, Java SE Embedded, JRockit component of Oracle Java SE (subcomponent: RMI). Supported versions that are affected are Java SE: 6u131, 7u121 and 8u112; Java SE Embedded: 8u111; JRockit: R28.3.12. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded, JRockit. While the vulnerability is in Java SE, Java SE Embedded, JRockit, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Java SE, Java SE Embedded, JRockit. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS v3.0 Base Score 9.0 (Confidentiality, Integrity and Availability impacts).
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Analysis
by VulDB Data Team • 05/15/2026
The vulnerability identified as CVE-2017-3241 represents a critical security flaw within Oracle Java SE and JRockit runtime environments, specifically affecting the Remote Method Invocation (RMI) component. This vulnerability exists in multiple Java versions including Java SE 6u131, 7u121, and 8u112, Java SE Embedded 8u111, and JRockit R28.3.12, making it a widespread concern across various Java deployments. The vulnerability operates at a fundamental level within the Java runtime architecture, specifically targeting the RMI subsystem that enables distributed computing through remote object invocation.
The technical nature of this vulnerability stems from insufficient validation of serialized data within the RMI component, creating a pathway for remote code execution attacks. The flaw allows an unauthenticated attacker to exploit the system by sending specially crafted data to APIs within the affected component, without requiring traditional attack vectors such as Java Web Start applications or applets. This characteristic places the vulnerability in the category of network-based attacks that can be executed through multiple protocols, making it particularly dangerous as it can be leveraged across various network interfaces and communication channels. The vulnerability's classification under CWE-502 (Deserialization of Untrusted Data) indicates that the system fails to properly validate and sanitize serialized objects before processing them, creating an attack surface where malicious data can be interpreted as legitimate commands.
The operational impact of CVE-2017-3241 is severe and potentially catastrophic for affected systems. Successful exploitation can result in complete compromise of Java SE, Java SE Embedded, and JRockit environments, effectively granting attackers full control over the affected systems. This takeover capability extends beyond individual applications to potentially impact entire enterprise infrastructures where Java applications serve as critical components. The CVSS v3.0 base score of 9.0 reflects the high severity and widespread potential for damage, as attackers can achieve confidentiality, integrity, and availability breaches simultaneously. The vulnerability's impact is particularly concerning because it affects runtime environments that are commonly deployed in production systems, making the potential for business disruption and data compromise significant.
Mitigation strategies for this vulnerability require immediate action from system administrators and security teams. The primary recommendation involves applying the official Oracle patches and updates that address the serialization flaw in the RMI component. Organizations should prioritize patching all affected Java versions across their infrastructure, including both standard Java SE deployments and JRockit environments. Network segmentation and firewall rules should be implemented to restrict unnecessary access to Java services, particularly those exposed to external networks. Additionally, implementing application whitelisting and runtime monitoring can help detect anomalous behavior indicative of exploitation attempts. The ATT&CK framework classification for this vulnerability would include techniques such as T1059 (Command and Scripting Interpreter) and T1133 (External Remote Services) as attackers would leverage the compromised Java environment to execute commands and potentially establish persistent access. Organizations should also consider disabling RMI functionality where it is not strictly required, and implement strict input validation for any data processed through RMI interfaces to reduce the attack surface and prevent exploitation attempts.