External risk intelligence

Eclipse Equinox OSGi allows attackers to take control of systems over the internet

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2023-54342

An external attacker can exploit a flaw in the Eclipse Equinox OSGi console to run unauthorized software on the host. This allows them to gain full control of the system, risking unauthorized access to sensitive files and customer data.

2Halo Surface Signal

Missing Authentication

External exposure likelihood

Halo Surface Signal score for CVE-2023-54342

The vulnerability affects a management console accessible via telnet. While network-reachable in some environments, such administrative interfaces are intended for internal or restricted use. Public internet exposure is not a standard or common deployment pattern and would represent a significant misconfiguration rather than intended, public-facing functionality.

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability exists in Eclipse Equinox OSGi's console interface, allowing unauthenticated attackers to execute arbitrary code. This could lead to a full system compromise by establishing a reverse shell connection.

  • Attackers can gain remote code execution.
  • Affects systems with exposed OSGi consoles.
  • Demands immediate attention due to severity.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker can exploit this flaw by connecting to the Eclipse Equinox OSGi console via telnet and sending specially crafted `fork` commands. This allows them to download and execute arbitrary Java code, ultimately establishing a reverse shell for remote code execution.

  • Attackers target the OSGi console.
  • Requires network access to the console.
  • Unauthenticated access is sufficient.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability in Eclipse Equinox OSGi's console interface allows unauthenticated remote code execution, posing a serious threat. Attackers can exploit the `fork` command via Telnet to download and run malicious code, establishing a reverse shell. Given the direct code execution and unauthenticated nature, this type of vulnerability is highly desirable for attackers.

  • Public exploit code is available.
  • Vulnerability is in a console interface.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

Prioritize blocking all unauthenticated access to the OSGi console, especially over Telnet, to prevent remote code execution. Investigate logs for any suspicious Telnet connections or `fork` command usage indicative of exploitation. If affected services cannot be immediately isolated, focus on robust network segmentation and strict firewall rules.

  • Block Telnet access to OSGi console.
  • Monitor for suspicious `fork` commands.
  • Isolate affected systems if possible.

Frequently asked questions

What is Eclipse Equinox OSGi and what is it used for?

Eclipse Equinox OSGi is a framework for developing and deploying modular Java applications and components. It's used to build dynamic systems where functionalities are packaged as "bundles" that can be managed, updated, or removed independently. This approach helps in creating complex, yet maintainable, software by promoting modularity and loose coupling, and it's a foundational part of the Eclipse IDE itself.

How does CVE-2023-54342 enable attackers to gain control?

CVE-2023-54342 is a critical vulnerability classified as CWE-306 (Missing Authentication for Critical Function). It exploits the Eclipse Equinox OSGi console interface, which by default exposes privileged commands without requiring authentication. Attackers can connect via Telnet, send a `fork` command, and execute arbitrary Java code, leading to a reverse shell and full system control.

What are the preconditions for an attacker to exploit this vulnerability?

An attacker must first identify a system running an affected version of Eclipse Equinox OSGi where the console port is exposed to the network. The attacker then establishes a Telnet connection to this exposed console. Exploitation does not require any user interaction or special privileges beyond network access to the console.

Why is this vulnerability particularly concerning for internet-facing systems?

This vulnerability is classified as external because it can be exploited over the network by an unauthenticated attacker. If the OSGi console is accessible from the internet, it presents a direct pathway for attackers to gain control of systems without needing any prior access or credentials.

What should be the first steps to address this vulnerability?

The immediate first step is to block all unauthenticated access to the OSGi console, especially over Telnet. It's also crucial to monitor system logs for any suspicious Telnet connections or unusual `fork` command usage. If isolation isn't immediately possible, strong network segmentation and strict firewall rules should be implemented.

References