CVE-2023-34340
📋 TL;DR
Apache Accumulo 2.1.0 has an improper authentication vulnerability where invalid credentials may be accepted, allowing unauthorized access. This affects all users running Accumulo 2.1.0. Attackers could bypass authentication and gain access to sensitive data stored in Accumulo.
💻 Affected Systems
- Apache Accumulo
📦 What is this software?
Accumulo by Apache
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of Accumulo data stores, allowing attackers to read, modify, or delete sensitive data, potentially leading to data breaches and system takeover.
Likely Case
Unauthorized access to Accumulo tables and data, potentially exposing sensitive information stored in the database.
If Mitigated
Limited impact if network segmentation and additional authentication layers prevent access to vulnerable instances.
🎯 Exploit Status
The vulnerability allows authentication bypass, making exploitation straightforward once the attack vector is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.1
Vendor Advisory: https://lists.apache.org/thread/syy6jftvy9l6tlhn33o0rzwhh4rd0z4t
Restart Required: Yes
Instructions:
1. Download Accumulo 2.1.1 from https://accumulo.apache.org/release/accumulo-2.1.1/ 2. Stop all Accumulo services 3. Replace Accumulo 2.1.0 with 2.1.1 4. Restart all Accumulo services 5. Verify authentication works correctly
🔧 Temporary Workarounds
Network Isolation
linuxRestrict network access to Accumulo instances to only trusted sources
iptables -A INPUT -p tcp --dport 9997 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 9997 -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit connections to Accumulo instances
- Add additional authentication layers (like VPN or bastion hosts) before accessing Accumulo
🔍 How to Verify
Check if Vulnerable:
Check Accumulo version: grep 'accumulo.version' $ACCUMULO_HOME/conf/accumulo.propertiesCheck Version:
grep 'accumulo.version' $ACCUMULO_HOME/conf/accumulo.propertiesVerify Fix Applied:
Attempt authentication with invalid credentials - should be rejected. Verify version shows 2.1.1.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts that succeed
- Unauthorized access patterns to Accumulo tables
Network Indicators:
- Unexpected connections to Accumulo ports (default 9997, 9999)
- Authentication bypass attempts
SIEM Query:
source="accumulo.log" AND ("authentication succeeded" OR "login successful") AND NOT user=authorized_user