CVE-2022-25167
📋 TL;DR
Apache Flume versions 1.4.0 through 1.9.0 are vulnerable to remote code execution when using JMS Source with JNDI LDAP data source URI. Attackers controlling the LDAP server can execute arbitrary code on vulnerable Flume instances. This affects all deployments using the vulnerable configuration.
💻 Affected Systems
- Apache Flume
📦 What is this software?
Flume by Apache
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the Flume server, potentially leading to data exfiltration, lateral movement, or ransomware deployment.
Likely Case
Remote code execution allowing attackers to run arbitrary commands, install malware, or access sensitive data processed by Flume.
If Mitigated
Limited impact if proper network segmentation and access controls prevent attackers from reaching vulnerable systems.
🎯 Exploit Status
Exploitation requires attacker control of LDAP server referenced in configuration. Similar to Log4Shell exploitation patterns.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.10.0 and later
Vendor Advisory: https://lists.apache.org/thread/16nf6b81zjpdc4y93ho99oxo83ddbsvg
Restart Required: Yes
Instructions:
1. Upgrade to Apache Flume 1.10.0 or later. 2. Replace JMS Source configuration to use fixed version. 3. Restart Flume services. 4. Verify JNDI is limited to java protocol only.
🔧 Temporary Workarounds
Disable JMS Source with JNDI LDAP
allRemove or disable JMS Source configurations using JNDI LDAP data source URIs
Edit flume configuration files to remove JMS Source with JNDI LDAP settings
Network Segmentation
allRestrict Flume servers from accessing external LDAP servers
Configure firewall rules to block outbound LDAP traffic from Flume servers
🧯 If You Can't Patch
- Implement strict network controls to prevent Flume servers from accessing untrusted LDAP servers
- Monitor for suspicious outbound LDAP connections from Flume servers
🔍 How to Verify
Check if Vulnerable:
Check Flume configuration files for JMS Source with JNDI LDAP data source URI settingsCheck Version:
flume-ng versionVerify Fix Applied:
Verify Flume version is 1.10.0+ and JNDI configuration only allows java protocol📡 Detection & Monitoring
Log Indicators:
- JNDI lookup attempts
- LDAP connection errors
- Unexpected process execution
Network Indicators:
- Outbound LDAP connections from Flume servers to untrusted IPs
- Unusual network traffic patterns
SIEM Query:
source="flume" AND (jndi OR ldap) AND (lookup OR connection)🔗 References
- http://www.openwall.com/lists/oss-security/2022/06/14/1
- https://issues.apache.org/jira/browse/FLUME-3416
- https://lists.apache.org/thread/16nf6b81zjpdc4y93ho99oxo83ddbsvg
- http://www.openwall.com/lists/oss-security/2022/06/14/1
- https://issues.apache.org/jira/browse/FLUME-3416
- https://lists.apache.org/thread/16nf6b81zjpdc4y93ho99oxo83ddbsvg
