CVE-2020-36514
📋 TL;DR
This vulnerability in the acc_reader Rust crate allows attackers to read from uninitialized memory locations via the fill_buf function. This can lead to information disclosure or potentially enable further exploitation. Any Rust application using vulnerable versions of the acc_reader crate is affected.
💻 Affected Systems
- acc_reader Rust crate
📦 What is this software?
Acc Reader by Acc Reader Project
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure of sensitive memory contents, potentially enabling further attacks like privilege escalation or remote code execution.
Likely Case
Application crashes or information leakage of random memory contents.
If Mitigated
Limited impact with proper memory isolation and sandboxing.
🎯 Exploit Status
The vulnerability is in a core library function, making exploitation relatively straightforward if the application uses the vulnerable code path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 2020-12-27
Vendor Advisory: https://rustsec.org/advisories/RUSTSEC-2020-0155.html
Restart Required: Yes
Instructions:
1. Update Cargo.toml to use acc_reader version > 0.12.27
2. Run 'cargo update acc_reader'
3. Rebuild and redeploy your application
4. Restart affected services
🔧 Temporary Workarounds
Remove acc_reader dependency
allReplace acc_reader with alternative safe crates or implement required functionality differently
cargo remove acc_reader
🧯 If You Can't Patch
- Isolate affected applications in containers or VMs with limited permissions
- Implement network segmentation to limit exposure of vulnerable services
🔍 How to Verify
Check if Vulnerable:
Check Cargo.lock for acc_reader version <= 0.12.27 or run 'cargo audit'Check Version:
grep acc_reader Cargo.lockVerify Fix Applied:
Verify Cargo.lock shows acc_reader version > 0.12.27 and 'cargo audit' reports no vulnerabilities📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unexpected memory read errors
Network Indicators:
- Unusual memory-related requests to services using acc_reader
SIEM Query:
process.name:your_app AND (event.code:ACCESS_VIOLATION OR error.message:*memory*)🔗 References
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/acc_reader/RUSTSEC-2020-0155.md
- https://rustsec.org/advisories/RUSTSEC-2020-0155.html
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/acc_reader/RUSTSEC-2020-0155.md
- https://rustsec.org/advisories/RUSTSEC-2020-0155.html
