CVE-2023-46738

Summary

CVE-2023-46738 is a security vulnerability in the CubeFS HandlerNode component of CubeFS, an open-source cloud-native file storage system. The vulnerability affects versions prior to 3.3.1 and can be exploited by authenticated users to crash the ObjectNode and deny access to other users. The vulnerability stems from improper handling of incoming HTTP requests, allowing attackers to control the memory allocation of the ObjectNode. By sending a malicious request that allocates more memory than available, an attacker can exhaust the system's memory with a single request. However, the attacker needs authentication and permissions to delete objects, as well as knowledge of existing buckets in the deployment. The most likely threat actor is an insider with access to CubeFS. Remediation includes updating CubeFS to version 3.3.1 or later and ensuring proper authorization controls are in place to prevent unauthorized access and object deletion. The vulnerability has a base severity of MEDIUM and an exploitability score of 2.8 out of 10, posing a potential high impact on availability.

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