CVE-2020-35870
📋 TL;DR
CVE-2020-35870 is a use-after-free vulnerability in the rusqlite crate for Rust that allows memory corruption through the Auxdata API. This can lead to arbitrary code execution, denial of service, or information disclosure. Any Rust application using rusqlite versions before 0.23.0 is affected.
💻 Affected Systems
- rusqlite Rust crate
📦 What is this software?
Rusqlite by Rusqlite Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crash (denial of service) or memory corruption leading to unpredictable behavior.
If Mitigated
Limited impact if proper memory safety controls and sandboxing are implemented.
🎯 Exploit Status
Exploitation requires specific API usage patterns and understanding of Rust memory management.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.23.0 and later
Vendor Advisory: https://rustsec.org/advisories/RUSTSEC-2020-0014.html
Restart Required: Yes
Instructions:
1. Update Cargo.toml to require rusqlite >= 0.23.0
2. Run 'cargo update rusqlite'
3. Rebuild and redeploy your application
4. Restart affected services
🔧 Temporary Workarounds
Avoid Auxdata API
allTemporarily avoid using the Auxdata API functions until patched
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all database operations
- Deploy application in sandboxed/containerized environments with minimal privileges
🔍 How to Verify
Check if Vulnerable:
Check Cargo.lock or Cargo.toml for rusqlite version < 0.23.0Check Version:
grep rusqlite Cargo.lock | grep versionVerify Fix Applied:
Verify rusqlite version >= 0.23.0 in Cargo.lock after update📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory corruption errors
- Unexpected process termination
Network Indicators:
- Unusual database query patterns
- Increased error rates in database operations
SIEM Query:
source="application.log" AND ("segmentation fault" OR "use-after-free" OR "memory corruption")