CVE-2024-41270
📋 TL;DR
CVE-2024-41270 is a TLS vulnerability in Gorush v1.18.4 that allows attackers to intercept and manipulate data transmitted to the server due to the use of deprecated TLS versions. This affects all deployments using the vulnerable version of Gorush's HTTP server implementation.
💻 Affected Systems
- Gorush
📦 What is this software?
Gorush by Appleboy
⚠️ Risk & Real-World Impact
Worst Case
Full interception and manipulation of all data transmitted to Gorush server, including authentication tokens, push notification payloads, and configuration data, potentially leading to complete system compromise.
Likely Case
Man-in-the-middle attacks intercepting push notification data and API communications, allowing attackers to read sensitive information and potentially inject malicious content.
If Mitigated
Limited data exposure if network segmentation and proper TLS configuration are enforced, but still vulnerable to sophisticated attacks.
🎯 Exploit Status
Exploitation requires network access to intercept TLS traffic; proof-of-concept details are available in the referenced gist.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.18.5 or later
Vendor Advisory: https://github.com/appleboy/gorush/releases
Restart Required: Yes
Instructions:
1. Stop Gorush service. 2. Update to v1.18.5 or later using 'go get github.com/appleboy/gorush'. 3. Rebuild and restart the service.
🔧 Temporary Workarounds
Enforce Modern TLS Configuration
allConfigure Gorush to use only TLS 1.2 or higher by modifying the server configuration
Set MinVersion: tls.VersionTLS12 in TLS configuration
Network Segmentation
linuxPlace Gorush behind a reverse proxy that enforces modern TLS standards
Configure nginx/apache with 'ssl_protocols TLSv1.2 TLSv1.3;'
🧯 If You Can't Patch
- Implement network-level TLS inspection and blocking of deprecated TLS versions
- Isolate Gorush server in a segmented network with strict access controls
🔍 How to Verify
Check if Vulnerable:
Check Gorush version with 'gorush version' command and verify if it's v1.18.4Check Version:
gorush versionVerify Fix Applied:
Verify version is v1.18.5 or later and test TLS negotiation using 'openssl s_client -connect <host>:<port> -tls1_1' (should fail)📡 Detection & Monitoring
Log Indicators:
- TLS handshake failures for deprecated versions
- Unexpected connection attempts using old TLS protocols
Network Indicators:
- TLS 1.0/1.1 negotiation attempts to Gorush ports
- SSL/TLS version downgrade attacks
SIEM Query:
source="gorush.log" AND ("TLS" OR "handshake") AND ("failed" OR "error")