Client-side encryption key in DEBUG logs

Issue

Snowflake discovered and remediated a vulnerability in the Snowflake Connector for C/C++ (“Connector”). When the logging level was set to DEBUG, the Connector would log locally the client-side encryption master key of the target stage during the execution of GET/PUT commands. This key by itself does not grant access to any sensitive data without additional access authorizations, and is not logged server-side by Snowflake.

This vulnerability affects Connector versions 0.5.0 through 2.1.0. Snowflake fixed the issue in version 2.2.0.

Vulnerability Details

When the logging level was set to DEBUG, the Connector would locally log the client-side encryption master key of the target stage during the execution of GET/PUT commands. The key was logged under the name queryStageMasterKey. The key by itself does not grant access to any sensitive data.

Solution

Snowflake released version 2.2.0 of the Snowflake Connector for C/C++, which fixes this issue. We recommend users upgrade to version 2.2.0.

Additional Information

If you discover a security vulnerability in one of our products or websites, please report the issue to Snowflake through our Vulnerability Disclosure Program hosted at HackerOne. For more information, please see our [Vulnerability Disclosure Policy](https://hackerone.com/snowflake?type=team).