CVE-2022-23848 in Alluxio
Summary
by MITRE • 02/21/2022
In Alluxio before 2.7.3, the logserver does not validate the input stream. NOTE: this is not the same as the CVE-2021-44228 Log4j vulnerability.
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Analysis
by VulDB Data Team • 02/25/2022
The vulnerability identified as CVE-2022-23848 affects Alluxio versions prior to 2.7.3 and specifically targets the logserver component's insufficient input validation mechanisms. This security flaw resides within the logging infrastructure of the distributed storage system, where the logserver fails to properly validate incoming data streams before processing them. The vulnerability represents a critical weakness in the system's defensive posture, as it allows potentially malicious input to bypass validation checks and be processed without proper sanitization. Unlike the widely publicized Log4j vulnerability CVE-2021-44228, this issue is distinct and operates within Alluxio's own logging subsystem rather than leveraging the popular java logging framework.
The technical implementation of this vulnerability stems from inadequate input stream validation within the logserver's data processing pipeline. When the logserver receives data streams from various sources including client applications, internal system components, or external logging services, it does not perform sufficient validation to ensure that the incoming data conforms to expected formats and parameters. This lack of validation creates opportunities for attackers to inject malformed or malicious input that could potentially exploit the system's processing logic. The vulnerability falls under the category of input validation flaws, which are commonly categorized as CWE-20 by the Common Weakness Enumeration catalog, representing "Improper Input Validation" in software systems.
The operational impact of this vulnerability extends beyond simple data corruption or denial of service scenarios. Attackers could potentially leverage this weakness to execute unauthorized operations within the Alluxio environment, particularly if the logserver processes untrusted input from multiple sources. The consequences could include information disclosure, privilege escalation, or disruption of logging services that are critical for system monitoring and security auditing. Since logging systems often serve as the primary source of operational intelligence and forensic data, compromising the logserver could significantly undermine the organization's ability to detect and respond to security incidents effectively. The vulnerability particularly affects environments where Alluxio is deployed with multiple client connections or where external logging integrations are in place.
Mitigation strategies for CVE-2022-23848 primarily focus on upgrading to Alluxio version 2.7.3 or later, which includes the necessary input validation patches. Organizations should also implement network segmentation and access controls to limit the sources of input streams to the logserver, reducing the attack surface. Additional defensive measures include monitoring logserver activities for anomalous input patterns and implementing robust logging and monitoring solutions that can detect potential exploitation attempts. Security teams should also conduct thorough vulnerability assessments of their Alluxio deployments to identify any other potential input validation weaknesses within the system. The remediation process aligns with the ATT&CK framework's mitigation strategies for input validation attacks, emphasizing the importance of proper data sanitization and validation at all system boundaries. Organizations should also consider implementing application-level firewalls or intrusion detection systems to monitor for suspicious patterns in log server communications and ensure that the patching process is completed across all affected systems in the environment.