CVE-2021-39480
📋 TL;DR
Bingrep v0.8.5 contains a memory allocation failure vulnerability that can cause the application to crash, resulting in Denial of Service. This affects users running the vulnerable version of the bingrep binary analysis tool. The vulnerability is triggered through normal usage when processing certain inputs.
💻 Affected Systems
- bingrep
📦 What is this software?
Bingrep by Bingrep Project
⚠️ Risk & Real-World Impact
Worst Case
Complete application crash and service disruption when processing malicious or malformed input files, potentially affecting automated analysis pipelines.
Likely Case
Application crashes during binary analysis operations, requiring manual restart and causing temporary disruption to analysis workflows.
If Mitigated
Minimal impact with proper input validation and monitoring; crashes are contained to individual analysis sessions.
🎯 Exploit Status
The GitHub issue demonstrates the crash condition with specific input patterns. Exploitation requires providing crafted input to the bingrep process.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.8.6 and later
Vendor Advisory: https://github.com/m4b/bingrep/issues/30
Restart Required: No
Instructions:
1. Check current version with 'bingrep --version'. 2. Update using cargo: 'cargo install bingrep --force'. 3. Verify update with 'bingrep --version' showing v0.8.6 or higher.
🔧 Temporary Workarounds
Input validation wrapper
allCreate a wrapper script that validates input files before passing to bingrep
#!/bin/bash
if [ -f "$1" ]; then
# Add file validation logic here
bingrep "$1"
else
echo "Invalid input"
fi
Process monitoring and restart
linuxMonitor bingrep processes and automatically restart on crash
#!/bin/bash
while true; do
bingrep "$@"
sleep 1
done
🧯 If You Can't Patch
- Limit bingrep usage to trusted, validated input files only
- Implement process monitoring to detect and alert on crashes
🔍 How to Verify
Check if Vulnerable:
Run 'bingrep --version' and check if output shows v0.8.5Check Version:
bingrep --versionVerify Fix Applied:
Run 'bingrep --version' and confirm version is v0.8.6 or higher📡 Detection & Monitoring
Log Indicators:
- Application crash logs
- Segmentation fault errors
- Unexpected process termination
Network Indicators:
- N/A - local tool
SIEM Query:
process.name:"bingrep" AND event.outcome:"failure"