CVE-2023-54342 Overview
CVE-2023-54342 is a remote code execution vulnerability in Eclipse Equinox OSGi versions 3.8 through 3.18. The flaw resides in the console interface and allows unauthenticated attackers to execute arbitrary Java code on the target system. Attackers establish a telnet connection to the exposed OSGi console, complete the telnet handshake, and issue fork commands to download and run malicious Java payloads. Successful exploitation can establish a reverse shell, granting full control of the host process. The weakness is classified under CWE-306: Missing Authentication for Critical Function.
Critical Impact
Unauthenticated network attackers can achieve remote code execution and reverse shell access on hosts exposing the Eclipse Equinox OSGi console.
Affected Products
- Eclipse Equinox OSGi 3.8
- Eclipse Equinox OSGi 3.9 through 3.17
- Eclipse Equinox OSGi 3.18
Discovery Timeline
- 2026-05-05 - CVE-2023-54342 published to NVD
- 2026-05-05 - Last updated in NVD database
Technical Details for CVE-2023-54342
Vulnerability Analysis
The vulnerability stems from the OSGi console exposing privileged commands without authentication. The Equinox console listens on a network socket and accepts telnet connections from any source. Once connected, an attacker can invoke the built-in fork command, which executes arbitrary processes within the OSGi runtime context. The console was historically designed as a developer convenience and assumed trusted access, yet production deployments often expose it to internal or external networks. This combination of missing authentication and command execution functionality enables full compromise of the Java process and underlying host.
Root Cause
The root cause is missing authentication on the OSGi console interface [CWE-306]. The console binds to a TCP port and processes commands such as fork without verifying the identity or authorization of the connected client. Any network-reachable attacker can interact with privileged console commands as if they were a local administrator.
Attack Vector
An attacker first identifies a host exposing the Equinox OSGi console port over the network. The attacker opens a telnet session and completes the standard telnet option negotiation handshake. After reaching the console prompt, the attacker issues a fork command that downloads a Java class or JAR from an attacker-controlled server and executes it. The executed code typically opens a reverse shell back to the attacker, providing interactive command execution under the privileges of the Java process.
No verified exploit code is reproduced here. Technical details and a working proof of concept are documented in the Exploit-DB entry #51878 and the VulnCheck advisory for Eclipse Equinox OSGi console RCE.
Detection Methods for CVE-2023-54342
Indicators of Compromise
- Inbound telnet connections to OSGi console ports, commonly TCP 1337 or other custom ports configured via -console or osgi.console settings.
- Outbound HTTP or HTTPS requests from Java processes retrieving unexpected .class or .jar files immediately after console connections.
- Child processes spawned by the Equinox or Eclipse Java runtime that execute shell interpreters such as /bin/sh, bash, or cmd.exe.
- Reverse shell network flows originating from hosts running Equinox-based applications.
Detection Strategies
- Monitor process lineage for Java processes spawning command interpreters or networking utilities such as nc, curl, or wget.
- Inspect network telemetry for telnet handshakes, IAC byte sequences 0xFF 0xFB, directed at internal Java application servers.
- Alert on Equinox runtime making outbound connections to non-allowlisted hosts shortly after inbound console traffic.
Monitoring Recommendations
- Enable command-line and process-creation auditing on hosts running Eclipse Equinox or any product embedding the Equinox runtime.
- Capture network flow data for application server subnets and flag any traffic to console ports from unexpected sources.
- Aggregate Java application logs centrally and search for osgi> prompts or fork command execution events.
How to Mitigate CVE-2023-54342
Immediate Actions Required
- Disable the OSGi console in production by removing the -console startup argument or setting osgi.console to an empty value.
- Restrict network access to any required console port using host-based firewalls so it is reachable only from 127.0.0.1.
- Inventory all applications embedding Eclipse Equinox 3.8 through 3.18 and prioritize patching internet-exposed instances.
- Rotate any credentials or secrets accessible to the affected Java processes if compromise is suspected.
Patch Information
Upgrade Eclipse Equinox to a fixed release that authenticates console access or disables remote console functionality by default. Consult the VulnCheck advisory and the Eclipse Equinox project release notes for the specific patched version applicable to your deployment.
Workarounds
- Bind the OSGi console exclusively to the loopback interface and require SSH tunneling for legitimate administrative access.
- Place affected services behind a reverse proxy or network segmentation boundary that blocks direct telnet access.
- Replace the telnet console with the Equinox SSH console bundle, which enforces authentication for remote sessions.
# Configuration example: disable the OSGi console at startup
# Remove -console flags from launch scripts, or bind to localhost only
java -Dosgi.console= -jar org.eclipse.osgi_<version>.jar
# Alternatively, restrict the console port (e.g., 1337) with iptables
iptables -A INPUT -p tcp --dport 1337 ! -s 127.0.0.1 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
