CVE-2024-51317
📋 TL;DR
A command injection vulnerability in NetSurf browser version 3.11 allows remote attackers to execute arbitrary code via the dom_node_normalize function. This affects users running the vulnerable version of NetSurf browser. Attackers can exploit this by tricking users into visiting malicious websites.
💻 Affected Systems
- NetSurf
📦 What is this software?
Netsurf by Netsurf Browser
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the NetSurf process, potentially leading to full system compromise if NetSurf runs with elevated privileges.
Likely Case
Arbitrary code execution in the browser context, allowing data theft, further system exploitation, or installation of malware.
If Mitigated
Limited to browser sandbox if properly configured, but still allows data exfiltration and limited system access.
🎯 Exploit Status
Exploit requires user interaction (visiting malicious website). Public disclosure includes technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.12 or later
Vendor Advisory: https://www.netsurf-browser.org/news/releases/3.12/
Restart Required: Yes
Instructions:
1. Download NetSurf 3.12 or later from official website. 2. Uninstall vulnerable version. 3. Install updated version. 4. Restart system.
🔧 Temporary Workarounds
Disable JavaScript
allPrevents exploitation by disabling JavaScript execution in NetSurf
Edit netsurf preferences to set javascript_enable = false
Network Filtering
allBlock malicious websites using network filtering
🧯 If You Can't Patch
- Restrict NetSurf to trusted websites only using browser policies
- Run NetSurf in a sandboxed environment with limited privileges
🔍 How to Verify
Check if Vulnerable:
Check NetSurf version: netsurf --versionCheck Version:
netsurf --versionVerify Fix Applied:
Verify version is 3.12 or higher: netsurf --version | grep -q '3.1[2-9]\|3.[2-9]'📡 Detection & Monitoring
Log Indicators:
- Unusual process spawns from netsurf process
- Suspicious command execution patterns
Network Indicators:
- Connections to suspicious domains after visiting websites
- Unusual outbound traffic from netsurf
SIEM Query:
process_name:netsurf AND (process_spawn OR command_execution)