CVE-2023-42276
📋 TL;DR
A buffer overflow vulnerability in hutool v5.8.21's jsonArray component allows attackers to execute arbitrary code or cause denial of service. This affects applications using vulnerable versions of the hutool Java utility library. Developers who integrate hutool into their projects are at risk.
💻 Affected Systems
- hutool
📦 What is this software?
Hutool by Hutool
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crash causing denial of service, potentially leading to data corruption.
If Mitigated
Limited impact with proper input validation and memory protection mechanisms in place.
🎯 Exploit Status
Buffer overflow vulnerabilities typically have low exploitation complexity when public details are available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v5.8.22 or later
Vendor Advisory: https://github.com/dromara/hutool/issues/3286
Restart Required: Yes
Instructions:
1. Update hutool dependency to v5.8.22 or later. 2. Rebuild and redeploy affected applications. 3. Restart services using the updated library.
🔧 Temporary Workarounds
Input validation
allImplement strict input validation for jsonArray inputs to prevent malicious payloads.
Memory protection
allEnable address space layout randomization (ASLR) and other memory protection mechanisms.
🧯 If You Can't Patch
- Isolate affected systems from untrusted networks
- Implement strict network filtering and monitoring
🔍 How to Verify
Check if Vulnerable:
Check project dependencies for hutool version 5.8.21 in pom.xml, build.gradle, or dependency files.Check Version:
Check build configuration files or run: java -cp hutool.jar cn.hutool.core.util.RuntimeUtilVerify Fix Applied:
Verify hutool version is 5.8.22 or later after update and test jsonArray functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes
- Memory access violation errors
- Unusual jsonArray processing
Network Indicators:
- Unexpected large JSON payloads to jsonArray endpoints
SIEM Query:
source="application_logs" AND ("buffer overflow" OR "segmentation fault" OR "access violation")