CVE-2020-36464
📋 TL;DR
This vulnerability in the heapless Rust crate allows an attacker to cause a use-after-free condition by cloning an iterator that has been partially consumed. This affects any Rust application using heapless versions before 0.6.1. The issue can lead to memory corruption and potential code execution.
💻 Affected Systems
- Rust applications using heapless crate
📦 What is this software?
Heapless by Heapless Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if the vulnerable code handles untrusted input.
Likely Case
Application crash or denial of service due to memory corruption.
If Mitigated
Limited impact if the application doesn't process untrusted data or has proper memory safety controls.
🎯 Exploit Status
Exploitation requires specific memory manipulation and understanding of Rust's ownership model.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: heapless 0.6.1 and later
Vendor Advisory: https://rustsec.org/advisories/RUSTSEC-2020-0145.html
Restart Required: Yes
Instructions:
1. Update Cargo.toml to require heapless >= 0.6.1
2. Run 'cargo update' to fetch the patched version
3. Rebuild and redeploy your application
🔧 Temporary Workarounds
Avoid Clone on partially consumed iterators
allManually avoid calling Clone on IntoIter instances that have been partially consumed
🧯 If You Can't Patch
- Implement input validation to prevent untrusted data from reaching vulnerable code paths
- Use memory safety tools like AddressSanitizer to detect exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check Cargo.lock or run 'cargo tree | grep heapless' to see if version < 0.6.1 is usedCheck Version:
cargo tree | grep heaplessVerify Fix Applied:
Verify heapless version is >= 0.6.1 in Cargo.lock after update📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory corruption errors
- Segmentation faults in Rust processes
Network Indicators:
- Unusual memory patterns in application monitoring
SIEM Query:
process.name:rust AND (event.type:crash OR memory.violation:true)