CVE-2023-21937 is a low-severity vulnerability affecting Oracle Java SE and the Oracle GraalVM Enterprise Edition. The vulnerability exists in the Networking component and impacts several versions, including Oracle Java SE: 8u361, 11.0.18, 17.0.6, and 20, as well as Oracle GraalVM Enterprise Edition: 20.3.9, 21.3.5, and 22.3.1. This vulnerability can be exploited by unauthenticated attackers with network access through various protocols.
Successful exploitation can lead to unauthorized updates, inserts, or deletions of accessible data within Oracle Java SE and GraalVM. This vulnerability primarily affects Java deployments, particularly those running sandboxed Java Web Start applications or applets that load untrusted code from the internet.
Given the low CVSS score of 3.7, the urgency for remediation is relatively low. However, organizations should still prioritize patching to safeguard their systems from potential exploitation.
The vulnerability was published on April 18, 2023, and has been classified as modified. The CVSS vector indicates a high attack complexity, requiring no privileges or user interaction for exploitation.
Vulnerability Details
The vulnerability allows unauthenticated attackers with network access to compromise Oracle Java SE and GraalVM. The official CVE description highlights the potential for unauthorized data manipulation, emphasizing the risk associated with running untrusted code in Java environments.
The CVSS score of 3.7 categorizes this vulnerability as low severity, indicating that while it may pose risks, the likelihood of exploitation is constrained by the complexity of the attack.
The affected products include various versions of Oracle Java SE and GraalVM, as well as components from NetApp and Debian, highlighting a broader impact across multiple platforms.
Technical Analysis
The root cause of CVE-2023-21937 is attributed to a vulnerability in the Networking component of Oracle Java SE and GraalVM. The attack vector is classified as network-based, allowing remote exploitation without the need for local access.
The attack complexity is high, which may limit the number of potential attackers capable of successfully exploiting the vulnerability. No privileges are required for exploitation, and no user interaction is necessary, making it easier for attackers to leverage the vulnerability if they can reach the affected systems.
The confidentiality impact is classified as none, while the integrity impact is low. There is no reported availability impact, indicating that the exploitation of this vulnerability primarily affects the integrity of data rather than the availability of the services.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized access to sensitive data via exploitation of this vulnerability. The blast radius could be significant in environments running Java applications that load untrusted code, especially if proper network security measures are not in place.
Despite the low CVSS score, organizations should remain vigilant. The exploitation potential exists, particularly in scenarios where Java applications are deployed without adequate security controls. Organizations should assess the urgency based on their specific environments and prioritize patching as appropriate.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerable versions include Oracle Java SE: 8u361, 11.0.18, 17.0.6, 20, and Oracle GraalVM Enterprise Edition: 20.3.9, 21.3.5, and 22.3.1. Organizations using these versions should ensure they have the latest patches applied.
Mitigation & Remediation
Organizations should prioritize patching their Oracle Java SE and GraalVM installations to remediate this vulnerability. For those unable to apply patches immediately, consider implementing network controls to restrict access to affected systems.
To validate remediation effectiveness, organizations should conduct thorough testing with penetration testing to ensure no similar vulnerabilities remain.
Detection Guidance
Monitoring for unauthorized changes in Java SE and GraalVM installations can provide early indicators of exploitation attempts. Organizations should review logs for unusual API access patterns and behavioral anomalies that may indicate misuse.
AppSecure Threat Intelligence Insight
CVE-2023-21937 represents a notable risk to organizations leveraging Java environments. The trend towards vulnerabilities in widely-used software components necessitates a proactive approach to security, including regular updates and vigilant monitoring.
Security teams should be aware of potential patterns of exploitation as they emerge, incorporating lessons learned from previous vulnerabilities to bolster defenses. For in-depth strategies, organizations may explore our resources on vulnerability management and penetration testing compliance to ensure robust security postures.
To further enhance defenses, organizations can refer to our security testing best practices guide.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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