# CVE-2023-51662: Snowflake Connector .NET does not properly check the Certificate Revocation List (CRL)

> The Snowflake .NET connector fails to check Certificate Revocation Lists by default, allowing attackers to bypass TLS certificate validation.

- **Severity:** Medium 6.0 (`CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Dec 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-hwcc-4cv8-cf3h

## What is CVE-2023-51662?

CVE-2023-51662 is a medium-severity vulnerability in snowflakedb snowflake-connector-net, published on 22 Dec 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The Snowflake .NET driver provides an interface to the Microsoft .NET open source software framework for developing applications. Snowflake recently received a report about a vulnerability in the Snowflake Connector .NET where the checks against the Certificate Revocation List (CRL) were not performed where the insecureMode flag was set to false, which is the default setting. The vulnerability affects versions between 2.0.25 and 2.1.4 (inclusive). Snowflake fixed the issue in version 2.1.5.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2023-51662?

2 open source packages ship an affected version, including Snowflake.Data. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `Snowflake.Data` | NuGet | From 2.0.25 | 2.1.5 |
| `Snowflake.Data` | NuGet | From 2.0.25 | 2.1.5 |

Products: Snowflake Snowflake Connector.

## How do I fix CVE-2023-51662?

Upgrade Snowflake.Data to 2.1.5 or later.

## Is CVE-2023-51662 being exploited?

There is no known exploitation of CVE-2023-51662 in the wild and no public exploit code.

## Other vulnerabilities in snowflakedb snowflake-connector-net

- [CVE-2023-34230](https://insights.sbomify.com/CVE-2023-34230/): Snowflake Connector vulnerable to Command Injection (high 7.3)
- [CVE-2023-34232](https://insights.sbomify.com/CVE-2023-34232/): Snowflake NodeJS Driver vulnerable to Command Injection (high 7.3)
- [CVE-2023-34233](https://insights.sbomify.com/CVE-2023-34233/): Snowflake Python Connector vulnerable to Command Injection (high 7.3)
- [CVE-2025-24793](https://insights.sbomify.com/CVE-2025-24793/): Snowflake Connector for Python has an SQL Injection in write_pandas (high 7.0)
- [CVE-2025-24794](https://insights.sbomify.com/CVE-2025-24794/): The Snowflake Connector for Python uses insecure deserialization of the OCSP response cache (medium 6.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-51662 and fix it if it is affected.

What it is: CVE-2023-51662 is a medium-severity vulnerability in snowflakedb snowflake-connector-net, published on 22 Dec 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-51662 in the wild and no public exploit code.

Affected packages and fixed versions:
- Snowflake.Data (NuGet): affected from 2.0.25; fixed in 2.1.5
- Snowflake.Data (NuGet): affected from 2.0.25; fixed in 2.1.5

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-51662/ (Markdown: https://insights.sbomify.com/CVE-2023-51662/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-51662
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-51662
- OSV: https://osv.dev/vulnerability/CVE-2023-51662

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-51662/
Summaries are generated and may contain mistakes; the official description above is the record.