Critical Vulnerability in Apache Hadoop HDFS Native Client Exposes Systems to Crashes and Data Corruption
A critical vulnerability in Apache Hadoop’s HDFS native client, tracked as CVE-2025-27821, has been disclosed, posing risks of system crashes, memory corruption, and data loss in production environments. The flaw, discovered by security researcher BUI Ngoc Tan, stems from an out-of-bounds write issue in the URI parser component of the HDFS native client, allowing attackers to manipulate untrusted input and overwrite memory beyond allocated boundaries.
The vulnerability affects organizations using Apache Hadoop for big data operations, particularly those relying on the HDFS native client in data pipelines and cluster management. Exploitation could lead to denial-of-service (DoS) conditions, memory corruption, or complete system unavailability, with heightened risks for enterprises handling sensitive data on vulnerable HDFS clusters.
Apache has classified the flaw as moderate severity but urges immediate action, recommending all affected users upgrade to Hadoop version 3.4.2 or later, which contains the necessary patches. Systems running earlier versions remain exposed.
To mitigate risks, administrators are advised to:
- Conduct an immediate version audit of Hadoop deployments.
- Monitor HDFS logs for suspicious URI patterns.
- Implement network-level access controls to restrict HDFS client connections to trusted sources.
- Review and update patch management procedures to prioritize this vulnerability.
The discovery underscores the importance of timely updates in distributed storage frameworks, particularly in mission-critical big data infrastructure.
Source: https://cyberpress.org/apache-hadoop-vulnerability-exposes-systems-to-crashes-and-data-corruption/
The Apache Software Foundation cybersecurity rating report: https://www.rankiteo.com/company/the-apache-software-foundation
"id": "THE1769425022",
"linkid": "the-apache-software-foundation",
"type": "Vulnerability",
"date": "1/2025",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"{'affected_entities': [{'industry': 'Big Data, Technology',
'name': 'Organizations using Apache Hadoop for big '
'data operations',
'type': 'Enterprise'}],
'attack_vector': 'Manipulation of untrusted input in URI parser',
'data_breach': {'sensitivity_of_data': 'Sensitive data on vulnerable HDFS '
'clusters'},
'description': 'A critical vulnerability in Apache Hadoop’s HDFS native '
'client, tracked as CVE-2025-27821, has been disclosed, posing '
'risks of system crashes, memory corruption, and data loss in '
'production environments. The flaw stems from an out-of-bounds '
'write issue in the URI parser component of the HDFS native '
'client, allowing attackers to manipulate untrusted input and '
'overwrite memory beyond allocated boundaries. Exploitation '
'could lead to denial-of-service (DoS) conditions, memory '
'corruption, or complete system unavailability.',
'impact': {'data_compromised': 'Potential data loss',
'downtime': 'Denial-of-service (DoS) conditions, complete system '
'unavailability',
'operational_impact': 'Memory corruption, system crashes',
'systems_affected': 'Apache Hadoop HDFS native client'},
'lessons_learned': 'Importance of timely updates in distributed storage '
'frameworks, particularly in mission-critical big data '
'infrastructure',
'post_incident_analysis': {'corrective_actions': 'Patch management and '
'version upgrades',
'root_causes': 'Out-of-bounds write issue in the '
'URI parser component of the HDFS '
'native client'},
'recommendations': ['Upgrade to Hadoop version 3.4.2 or later',
'Conduct an immediate version audit of Hadoop deployments',
'Monitor HDFS logs for suspicious URI patterns',
'Implement network-level access controls to restrict HDFS '
'client connections to trusted sources',
'Review and update patch management procedures'],
'references': [{'source': 'Security researcher BUI Ngoc Tan'}],
'response': {'containment_measures': ['Conduct an immediate version audit of '
'Hadoop deployments',
'Monitor HDFS logs for suspicious URI '
'patterns',
'Implement network-level access '
'controls to restrict HDFS client '
'connections to trusted sources',
'Review and update patch management '
'procedures'],
'enhanced_monitoring': 'Monitor HDFS logs for suspicious URI '
'patterns',
'remediation_measures': 'Upgrade to Hadoop version 3.4.2 or '
'later'},
'title': 'Critical Vulnerability in Apache Hadoop HDFS Native Client Exposes '
'Systems to Crashes and Data Corruption',
'type': 'Vulnerability',
'vulnerability_exploited': 'CVE-2025-27821 (Out-of-bounds write in HDFS '
'native client)'}