Race condition when checking access to Easy Logging configuration file
Low3.3CVE-2025-46326 · Published Apr 28, 2025
# Issue Snowflake discovered and remediated a vulnerability in the Snowflake Connector for .NET (“Connector”). When using the Easy Logging feature on Linux and macOS, the Connector didn’t correctly verify the permissions of the logging configuration file, potentially allowing an attacker with local access to overwrite the configuration and gain control over logging level and output location. This vulnerability affects Connector versions 2.1.2 through 4.4.0. Snowflake fixed the issue in version 4.4.1. # Vulnerability Details When using the Easy Logging feature on Linux and macOS, the Connector reads logging configuration from a user-provided file. On Linux and macOS, the Connector verifies that the configuration file can be written to only by its owner. That check was vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition and failed to verify that the file owner matches the user running the Connector. This could allow a local attacker with write access to the configuration file or the directory containing it to overwrite the configuration and gain control over logging level and output location. # Solution Snowflake released version 4.4.1 of the Snowflake Connector f...
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Snowflake.Data NuGet | >= 2.1.2, < 4.4.1 | 4.4.1 |
Details and references
# Issue Snowflake discovered and remediated a vulnerability in the Snowflake Connector for .NET (“Connector”). When using the Easy Logging feature on Linux and macOS, the Connector didn’t correctly verify the permissions of the logging configuration file, potentially allowing an attacker with local access to overwrite the configuration and gain control over logging level and output location. This vulnerability affects Connector versions 2.1.2 through 4.4.0. Snowflake fixed the issue in version 4.4.1. # Vulnerability Details When using the Easy Logging feature on Linux and macOS, the Connector reads logging configuration from a user-provided file. On Linux and macOS, the Connector verifies that the configuration file can be written to only by its owner. That check was vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition and failed to verify that the file owner matches the user running the Connector. This could allow a local attacker with write access to the configuration file or the directory containing it to overwrite the configuration and gain control over logging level and output location. # Solution Snowflake released version 4.4.1 of the Snowflake Connector for .NET, which fixes this issue. We recommend users upgrade to version 4.4.1. # 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).
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-367
More Snowflake advisories
All Snowflake| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Apr 282025 | Race condition when checking access to Easy Logging configuration file | Low3.3 | 2.0.4 |
| Apr 282025 | Race condition when checking access to Easy Logging configuration file | Low3.3 | 1.13.3 |
| Apr 282025 | Client-side encryption key in DEBUG logs | Low3.3 | 2.2.0 |
| Apr 282025 | Retrying of malformed requests | Low3.3 | 2.2.0 |
| Mar 132025 | Client-side encryption key in DEBUG logs | Low3.3 | 3.23.1 |
| Jan 292025 | Insecure cache files permissions | Medium4.4 | 3.13.1 |