CVE-2025-46328 is a vulnerability identified in the snowflake-connector-nodejs, a NodeJS driver used to interface with Snowflake, a cloud-based data warehousing service. The affected versions range from 1.10.0 up to but not including 2.0.4. The vulnerability is a Time-of-Check to Time-of-Use (TOCTOU) race condition categorized under CWE-367. Specifically, this issue arises when the Easy Logging feature is enabled on Linux and macOS systems. The driver reads its logging configuration from a user-supplied file and performs a security check to ensure that the file is writable only by its owner. However, the check is flawed because it does not verify that the file owner matches the user executing the driver. Due to this race condition, a local attacker who has write access to the configuration file or its containing directory can exploit the timing gap between the ownership check and the actual use of the file. This allows the attacker to overwrite the logging configuration, potentially controlling the logging level and redirecting log output to arbitrary locations. Such manipulation could be leveraged to hide malicious activity or escalate privileges indirectly by influencing log behavior. The vulnerability requires local access with limited privileges (PR:L) but does not require user interaction (UI:N). The CVSS v3.1 base score is 3.3, indicating a low severity primarily due to the limited impact on confidentiality and no impact on integrity or availability. The issue has been addressed and patched in version 2.0.4 of the snowflake-connector-nodejs driver. No known exploits have been reported in the wild to date.

For European organizations utilizing Snowflake with the snowflake-connector-nodejs driver on Linux or macOS environments, this vulnerability poses a localized risk. Since exploitation requires local access with write permissions to the logging configuration file or its directory, the threat is primarily to internal systems or developer environments rather than remote attackers. Potential impacts include unauthorized modification of logging configurations, which can lead to obfuscation of malicious activities or misdirected logs, complicating incident detection and response. Although the vulnerability does not directly compromise data confidentiality, integrity, or availability, it can indirectly aid attackers in maintaining persistence or evading detection. Organizations with strict compliance requirements around audit logging and monitoring may find this particularly concerning. The risk is mitigated if proper file system permissions and user access controls are enforced. However, in environments where multiple users share development or operational systems, or where local privilege escalation is possible, the vulnerability could be leveraged as part of a broader attack chain. Given the low CVSS score and the requirement for local access, the overall impact is limited but should not be ignored in sensitive or high-security contexts.

1. Upgrade the snowflake-connector-nodejs driver to version 2.0.4 or later, where the vulnerability has been patched. 2. Restrict write permissions on the logging configuration file and its containing directory to trusted users only, ensuring that only the intended owner can modify these files. 3. Implement strict user access controls and minimize the number of users with write access to system and application directories, especially on Linux and macOS systems running Snowflake connectors. 4. Employ file integrity monitoring solutions to detect unauthorized changes to logging configuration files. 5. Use containerization or sandboxing to isolate the Snowflake connector processes, limiting the potential impact of local exploits. 6. Regularly audit and review logging configurations and outputs to detect anomalies or unexpected changes. 7. Educate developers and system administrators about the risks of TOCTOU race conditions and the importance of secure file handling practices. 8. Where possible, disable the Easy Logging feature if it is not required, to reduce the attack surface.