CVE-2025-14935
📋 TL;DR
This is a heap-based buffer overflow vulnerability in NSF Unidata NetCDF-C library that allows remote code execution when processing malicious files. Attackers can exploit it by tricking users into opening specially crafted NetCDF files, potentially compromising systems running vulnerable versions. The vulnerability affects applications that use the NetCDF-C library for scientific data processing.
💻 Affected Systems
- NSF Unidata NetCDF-C library
📦 What is this software?
Netcdf by Unidata
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the user running the vulnerable application, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation or application crash leading to denial of service, with potential for data corruption or limited code execution depending on exploit sophistication.
If Mitigated
Application crash with no code execution if exploit fails or if memory protections (ASLR, DEP) are effective, resulting in denial of service only.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) and successful heap manipulation. The vulnerability is in ZDI's disclosure pipeline (ZDI-CAN-27168) suggesting active research.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Unidata NetCDF-C release notes for version containing fix for CVE-2025-14935
Vendor Advisory: https://www.unidata.ucar.edu/software/netcdf/
Restart Required: Yes
Instructions:
1. Check current NetCDF-C version using 'nc-config --version' or similar
2. Visit Unidata NetCDF website for security advisories
3. Download and install the patched version of NetCDF-C
4. Recompile any applications that link against NetCDF-C
5. Restart affected services and applications
🔧 Temporary Workarounds
Input Validation Wrapper
allImplement custom validation for NetCDF dimension names before passing to library
# Custom code required - no single command
Memory Protection Hardening
allEnable ASLR, DEP, and other memory protection mechanisms
# Linux: echo 2 > /proc/sys/kernel/randomize_va_space
# Windows: Enable Data Execution Prevention (DEP) via System Properties
🧯 If You Can't Patch
- Implement strict file validation for NetCDF files from untrusted sources
- Run NetCDF processing applications with minimal privileges and in isolated environments
🔍 How to Verify
Check if Vulnerable:
Check NetCDF-C library version and compare against patched version in vendor advisoryCheck Version:
nc-config --version 2>/dev/null || ncdump -h 2>&1 | grep 'NetCDF Library Version' || find /usr -name '*netcdf*.so*' -exec strings {} \; | grep 'NetCDF Library Version'Verify Fix Applied:
Verify installed NetCDF-C version matches or exceeds patched version, test with known safe NetCDF files📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults or heap corruption errors when processing NetCDF files
- Unusual memory allocation patterns in NetCDF-related processes
Network Indicators:
- Unexpected NetCDF file downloads from untrusted sources
- Network traffic patterns suggesting file uploads to NetCDF processing services
SIEM Query:
source="*netcdf*" AND (event_type="crash" OR error="segmentation fault" OR error="heap corruption")