CVE-2023-51662

Credential theft via omitted certificate revocation checks

Published Dec 22, 2023 · Updated Aug 2, 2024

Improper certificate validation in Snowflake Connector for .NET 2.0.25 through 2.1.4 allows man-in-the-middle attackers to steal credentials. With insecureMode set to its false default, the connector omits CRL checks and accepts a correctly issued Snowflake TLS certificate after revocation. Exploitation requires intercepted network traffic and possession of the corresponding private key; exposed Snowflake credentials can then be compromised.

CVSS severity6.0
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Snowflake Connector for .NET 2.0.25 through 2.1.4 allows man-in-the-middle attackers to steal credentials. With insecureMode set to its false default, the connector omits CRL checks and accepts a correctly issued Snowflake TLS certificate after revocation. Exploitation requires intercepted network traffic and possession of the corresponding private key; exposed Snowflake credentials can then be compromised.

The record

CVE
CVE-2023-51662
Published
Dec 22, 2023
Updated
Aug 2, 2024
Vendor
Snowflake
Product
Snowflake Connector for .NET
Classifications
CWE-295, T1557
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.0.25, <= 2.1.4

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

Snowflake · Snowflake Connector for .NETversion=>= 2.0.25, <= 2.1.4

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
6.0GitHub, Inc.CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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