Horizon Alert
Summary of the vulnerability and why it matters
This advisory concerns a vulnerability in Apache Kyuubi's handling of file uploads through its REST API. An attacker could exploit this to write files to unintended locations on the server, potentially impacting system integrity. The primary concern is confirming relevance and exposure within your environment.
- File upload vulnerability in Apache Kyuubi.
- Matters for server integrity and data protection.
- Confirm if Kyuubi is in use and assess exposure.
Attack Path
How an attacker could exploit the issue
A remote attacker could exploit this vulnerability by sending a crafted request to the Apache Kyuubi REST batch upload endpoint. By manipulating the filename within the multipart upload request to include path traversal sequences, an attacker could trick the server into writing files to arbitrary locations on the filesystem, potentially leading to code execution or denial of service, depending on the server's permissions.
- Attacker can reach the REST batch upload endpoint.
- Attacker provides path traversal sequences in filename.
- Server writes files outside intended directory.
Live Threat
Current exploitation, exposure, and threat context
A remote attacker could exploit this vulnerability by sending a specially crafted filename during a multipart upload to the Apache Kyuubi REST batch upload endpoint. This could allow the attacker to write controlled content to arbitrary file locations on the server's filesystem, potentially overwriting or manipulating files and directories accessible by the Kyuubi server process.
- Server files and directories.
- Via malicious filename during upload.
- Arbitrary file writes on server.
Operational Fix
Recommended remediation, mitigation, and detection steps
In real-world scenarios, the platform or infrastructure team is likely responsible for managing Apache Kyuubi. The first practical step is to identify all instances of Kyuubi, determine their exposure and business criticality, and then confirm the accountable owner for remediation planning.
- Platform/Infrastructure team owns this.
- Verify Kyuubi instances and exposure.
- Plan remediation with vendor coordination.
