CVE-2021-45718
📋 TL;DR
This vulnerability in the rusqlite Rust crate involves a use-after-free bug in the rollback_hook function, which could allow attackers to execute arbitrary code or cause a denial of service. It affects applications using vulnerable versions of the rusqlite library for SQLite database operations in Rust. The issue occurs when rollback hooks are improperly managed during transaction rollbacks.
💻 Affected Systems
- rusqlite Rust crate
📦 What is this software?
Rusqlite by Rusqlite Project
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 or denial of service, potentially corrupting database transactions.
If Mitigated
Limited impact with proper memory safety controls and sandboxing in place.
🎯 Exploit Status
Exploitation requires triggering specific rollback hook conditions. No publicly available exploit code has been documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.25.4 or 0.26.2
Vendor Advisory: https://rustsec.org/advisories/RUSTSEC-2021-0128.html
Restart Required: Yes
Instructions:
1. Update Cargo.toml to specify rusqlite >=0.25.4 or >=0.26.2. 2. Run 'cargo update' to fetch the patched version. 3. Rebuild and redeploy your application.
🔧 Temporary Workarounds
Avoid rollback_hook usage
allTemporarily disable or avoid using the rollback_hook functionality until patched.
Modify code to remove or comment out rollback_hook calls
🧯 If You Can't Patch
- Implement strict input validation and sanitization for database operations
- Run application in a sandboxed environment with limited privileges
🔍 How to Verify
Check if Vulnerable:
Check Cargo.lock or run 'cargo tree | grep rusqlite' to see installed version.Check Version:
grep rusqlite Cargo.lockVerify Fix Applied:
Confirm rusqlite version is 0.25.4+ or 0.26.2+ in Cargo.lock after update.📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unexpected process termination during database rollbacks
Network Indicators:
- None specific - this is a local memory corruption vulnerability
SIEM Query:
Process termination events from applications using rusqlite with error codes indicating memory access violations