CVE-2019-2449 in Java SE
Summary
by MITRE
Vulnerability in the Java SE component of Oracle Java SE (subcomponent: Deployment). The supported version that is affected is Java SE: 8u192. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets (in Java SE 8), that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.0 Base Score 3.1 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L).
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Analysis
by VulDB Data Team • 06/28/2023
This vulnerability exists within the Java SE deployment component of Oracle Java SE version 8u192 and represents a significant security concern for client-side Java applications. The flaw manifests as a difficulty to exploit condition that allows unauthenticated network-based attackers to compromise Java SE systems through multiple protocols. The vulnerability requires human interaction from users other than the attacker, indicating that successful exploitation typically involves social engineering or user deception tactics. The attack vector specifically targets Java deployments in client environments where sandboxed applications execute untrusted code from potentially malicious sources.
The technical nature of this vulnerability stems from the Java sandbox security model that protects users when running untrusted code through Web Start applications or applets. When users encounter malicious content in these sandboxed environments, the vulnerability allows attackers to potentially bypass security restrictions and execute unauthorized operations. The partial denial of service impact means that while complete system compromise may not occur, the vulnerability can disrupt normal Java SE operations and functionality. This particular weakness operates within the context of Java's security architecture where trusted code execution differs significantly from untrusted code handling, making client-side deployments particularly vulnerable.
The operational impact of CVE-2019-2449 extends beyond simple service disruption to potentially enable more sophisticated attacks within the compromised Java environment. Organizations running Java clients that process internet-based content face elevated risk levels when this vulnerability remains unpatched, as users may inadvertently interact with malicious content that triggers the exploit. The CVSS 3.0 score of 3.1 reflects the low complexity required for exploitation combined with the limited impact to confidentiality and integrity, while the availability impact rating of 3.1 indicates the potential for partial service disruption. This vulnerability specifically targets the client-side Java execution model where users run sandboxed applications that load code from untrusted sources, creating a security boundary that can be compromised.
Mitigation strategies should focus on immediate patching of affected Java SE 8u192 installations and implementation of network-based controls to restrict access to potentially malicious content. Organizations should disable or restrict Java applet and Web Start functionality in client environments where possible, particularly in browsers and desktop applications that do not require Java functionality. The remediation process should include comprehensive vulnerability assessments of all Java deployments, with particular attention to client systems running untrusted code execution environments. Security teams should implement network segmentation and monitoring to detect anomalous Java-related network activity that might indicate exploitation attempts. This vulnerability aligns with CWE-250 (Execution of Code with Unnecessary Privileges) and can be mapped to ATT&CK techniques involving social engineering and exploitation of trusted relationships. The attack surface is particularly wide for organizations with extensive client-side Java deployments, making proactive remediation essential for maintaining security posture.