CVE-2023-22081 Overview
CVE-2023-22081 is a vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition products affecting the JSSE (Java Secure Socket Extension) component. This vulnerability allows an unauthenticated attacker with network access via HTTPS to cause a partial denial of service condition against affected Java deployments.
The vulnerability primarily impacts client-side Java deployments running sandboxed Java Web Start applications or sandboxed Java applets that load and execute untrusted code from the internet. Server-side deployments that only load and run trusted code (such as administrator-installed applications) are not affected by this vulnerability.
Critical Impact
Unauthenticated attackers can remotely cause partial denial of service to Java applications using HTTPS connections without any user interaction required.
Affected Products
- Oracle JDK: 8u381, 8u381-perf, 11.0.20, 17.0.8, 21
- Oracle JRE: 8u381, 8u381-perf, 11.0.20, 17.0.8, 21
- Oracle GraalVM for JDK: 17.0.8, 21
- Oracle GraalVM Enterprise Edition: 20.3.11, 21.3.7, 22.3.3
- NetApp Cloud Insights Acquisition Unit
- NetApp Cloud Insights Storage Workload Security Agent
Discovery Timeline
- October 17, 2023 - CVE-2023-22081 published to NVD
- November 3, 2025 - Last updated in NVD database
Technical Details for CVE-2023-22081
Vulnerability Analysis
This vulnerability resides in the JSSE component, which provides the implementation for SSL/TLS protocols in Java. The flaw enables remote attackers to partially disrupt service availability through network-based attacks over HTTPS connections.
The vulnerability is characterized by its ease of exploitation—requiring no authentication, no user interaction, and only network access to the target system via HTTPS. However, the scope is unchanged, meaning the vulnerable component is the same as the impacted component, and the impact is limited to availability without affecting confidentiality or integrity.
The vulnerability specifically targets Java client deployments that rely on the Java sandbox for security when executing untrusted code. This includes environments running Java Web Start applications or Java applets sourced from external networks. The attack does not require any privileges and can be initiated by any unauthenticated attacker with network connectivity to the vulnerable endpoint.
Root Cause
The vulnerability stems from improper handling within the JSSE component when processing HTTPS connections. While Oracle has not disclosed the specific technical details, the flaw allows attackers to trigger resource consumption or processing anomalies that result in degraded service availability. The issue is classified under NVD-CWE-noinfo, indicating the specific weakness type has not been publicly documented.
Attack Vector
The attack leverages network access via HTTPS to exploit the JSSE vulnerability. An attacker can target any Java application that:
- Uses the affected JSSE component for TLS/SSL connections
- Runs sandboxed Java Web Start applications or applets
- Loads and executes code from untrusted sources (e.g., internet-sourced content)
- Relies on the Java sandbox as a security boundary
The exploitation requires no authentication credentials and no user interaction, making it straightforward for attackers to execute. The attack results in a partial denial of service, degrading the availability of the affected Java application without completely taking it offline.
Detection Methods for CVE-2023-22081
Indicators of Compromise
- Unusual volume of HTTPS connection attempts or TLS handshake requests targeting Java applications
- Increased resource utilization (CPU, memory) in Java processes handling HTTPS traffic
- Elevated error rates in JSSE-related logs during SSL/TLS operations
- Application performance degradation coinciding with suspicious network activity patterns
Detection Strategies
- Monitor Java application logs for anomalous JSSE exceptions or SSL/TLS processing errors
- Implement network traffic analysis to identify unusual HTTPS connection patterns targeting Java endpoints
- Deploy application performance monitoring to detect partial service degradation in Java applications
- Review system resource utilization metrics for Java processes handling encrypted communications
Monitoring Recommendations
- Enable detailed logging for JSSE component activities in Java applications
- Configure alerting thresholds for Java process resource consumption anomalies
- Establish baseline metrics for normal HTTPS traffic patterns to identify deviations
- Implement continuous monitoring of Java runtime versions across the environment to ensure vulnerable versions are tracked
How to Mitigate CVE-2023-22081
Immediate Actions Required
- Update Oracle Java SE to the latest patched version (post 8u381, 11.0.20, 17.0.8, or 21)
- Upgrade Oracle GraalVM for JDK to versions newer than 17.0.8 and 21
- Upgrade Oracle GraalVM Enterprise Edition beyond 20.3.11, 21.3.7, or 22.3.3
- Review and update NetApp Cloud Insights components per NetApp security advisory
Patch Information
Oracle has addressed this vulnerability in their October 2023 Critical Patch Update. Administrators should apply the latest Java security updates available from the Oracle Security Alert CPU October 2023.
Additional vendor advisories with patch information:
- NetApp Security Advisory NTAP-20231027-0006
- Debian Security Advisory DSA-5537
- Debian Security Advisory DSA-5548
- Debian LTS Announcement
Workarounds
- Restrict network access to Java applications from untrusted networks where feasible
- Disable Java Web Start and Java applet functionality if not required for business operations
- Implement network-level controls to limit HTTPS access to Java endpoints from external sources
- Deploy web application firewalls or reverse proxies to filter malicious traffic targeting Java services
# Verify installed Java version to check vulnerability status
java -version
# Check for affected JDK installations on Linux systems
find /usr -name "java" -type f -exec {} -version \; 2>&1 | grep -E "(1.8.0_381|11.0.20|17.0.8|21.0.0)"
# Update Java using package manager (Debian/Ubuntu example)
sudo apt update && sudo apt install openjdk-17-jdk
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
