CVE-2019-2602 in Java SE
Summary
by MITRE
Vulnerability in the Java SE, Java SE Embedded component of Oracle Java SE (subcomponent: Libraries). Supported versions that are affected are Java SE: 7u211, 8u202, 11.0.2 and 12; Java SE Embedded: 8u201. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Java SE, Java SE Embedded. 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 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 • 09/03/2023
The vulnerability identified as CVE-2019-2602 represents a critical availability flaw within Oracle Java SE and Java SE Embedded platforms, specifically affecting the Libraries subcomponent. This vulnerability manifests in versions Java SE 7u211, 8u202, 11.0.2, and 12, alongside Java SE Embedded 8u201, making it a widespread concern across multiple Java runtime environments. The flaw operates at the core library level, where it can be triggered through network-based attacks without requiring authentication, presenting a significant threat vector for malicious actors seeking to disrupt Java-based systems.
The technical nature of this vulnerability stems from insufficient input validation within Java's library components, allowing attackers to craft malicious data inputs that can cause the Java runtime environment to enter a state of indefinite hanging or repeated crashes. This behavior constitutes a complete denial of service condition that can render affected systems unusable until manual intervention or system restart occurs. The vulnerability's exploitability is classified as easily accessible due to its network-based nature and the fact that it does not require user interaction or privileged access to execute successfully. The attack vector specifically targets APIs within the affected component, bypassing traditional web application security measures that might protect against applet or web start-based exploits.
From an operational perspective, this vulnerability poses substantial risk to organizations relying on Java-based applications and services, as it can lead to complete service disruption without requiring any authentication credentials or complex attack preparation. The impact extends beyond simple availability issues to potentially affect business continuity and operational resilience, particularly in mission-critical environments where Java applications form the backbone of business operations. The CVSS 3.0 scoring of 7.5 reflects the high availability impact, with a base score indicating serious consequences for affected systems and organizations.
Organizations should prioritize immediate remediation through official Oracle security patches and updates to address this vulnerability, as the flaw can be exploited remotely without user interaction. System administrators should also implement network segmentation and access controls to limit exposure, while monitoring for anomalous network traffic patterns that might indicate exploitation attempts. The vulnerability aligns with CWE-121, which addresses stack-based buffer overflow conditions, and maps to ATT&CK technique T1499, specifically covering network denial of service attacks. Additionally, this vulnerability demonstrates characteristics of T1566, representing the initial access phase through network-based attacks, making comprehensive security monitoring essential for early detection and response.