CVE-2025-43015
📋 TL;DR
This vulnerability in JetBrains RubyMine allows remote interpreters to bind to all network interfaces instead of only localhost, potentially exposing development services to unauthorized network access. It affects users running RubyMine with remote interpreters before version 2025.1. Attackers could access development tools and services that should be restricted to localhost.
💻 Affected Systems
- JetBrains RubyMine
📦 What is this software?
Rubymine by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Remote attackers gain unauthorized access to development services, debuggers, or internal tools exposed through RubyMine's remote interpreter functionality, potentially leading to code execution, data theft, or lateral movement.
Likely Case
Development services become accessible on the network, allowing unauthorized users to connect to debugging sessions, code execution environments, or other development tools that should be local-only.
If Mitigated
With proper network segmentation and firewall rules, the exposure is limited to internal networks, reducing but not eliminating the risk of unauthorized access from internal users.
🎯 Exploit Status
Exploitation requires network access to the vulnerable system. No authentication is needed once the service is exposed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: RubyMine 2025.1
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Open RubyMine. 2. Go to Help > Check for Updates. 3. Install RubyMine 2025.1 or later. 4. Restart RubyMine after installation.
🔧 Temporary Workarounds
Disable Remote Interpreters
allTemporarily disable remote interpreter functionality until patching is possible.
Configure RubyMine to use only local interpreters in project settings
Host Firewall Restriction
linuxConfigure host firewall to block inbound connections to RubyMine ports.
sudo ufw deny from any to any port 1024-65535
netsh advfirewall firewall add rule name="Block RubyMine" dir=in action=block protocol=TCP localport=1024-65535
🧯 If You Can't Patch
- Disable remote interpreter functionality entirely in RubyMine settings
- Implement strict network segmentation and firewall rules to isolate development systems
🔍 How to Verify
Check if Vulnerable:
Check RubyMine version in Help > About. If version is below 2025.1 and remote interpreters are configured, the system is vulnerable.Check Version:
Check RubyMine About dialog or run: grep -i version ~/.RubyMine*/config/options/ide.general.xml (Linux/macOS)Verify Fix Applied:
After updating, verify version is 2025.1 or later in Help > About. Test remote interpreter functionality to ensure it only binds to localhost.📡 Detection & Monitoring
Log Indicators:
- Network connections to RubyMine ports from unauthorized IPs
- Remote interpreter binding to 0.0.0.0 or non-localhost interfaces
Network Indicators:
- Unexpected network traffic on ports used by RubyMine remote interpreters
- Connection attempts to development ports from non-development systems
SIEM Query:
source="*rubymine*" AND (event="network_bind" OR event="remote_connection") AND (interface="0.0.0.0" OR dest_ip!=127.0.0.1)