The AWS Cloud Development Kit (AWS CDK) is an open-source software development framework to define cloud infrastructure in code and provision it through AWS CloudFormation. Users who use IAM OIDC custom resource provider package will download CA Thumbprints as part of the custom resource workflow. However, the current `tls.connect` method will always set `rejectUnauthorized: false` which is a potential security concern. CDK should follow the best practice and set `rejectUnauthorized: true`. However, this could be a breaking change for existing CDK applications and we should fix this with a feature flag. Note that this is marked as low severity Security advisory because the issuer url is provided by CDK users who define the CDK application. If they insist on connecting to a unauthorized OIDC provider, CDK should not disallow this. Additionally, the code block is run in a Lambda environment which mitigate the MITM attack. The patch is in progress. To mitigate, upgrade to CDK v2.177.0 (Expected release date 2025-02-22). Once upgraded, users should make sure the feature flag '@aws-cdk/aws-iam:oidcRejectUnauthorizedConnections' is set to true in `cdk.context.json` or `cdk.json`. There are no known workarounds for this vulnerability.
References
Configurations
History
19 Sep 2025, 18:45
Type | Values Removed | Values Added |
---|---|---|
CPE | cpe:2.3:a:amazon:aws_cloud_development_kit:*:*:*:*:*:*:*:* | |
CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.1 |
First Time |
Amazon aws Cloud Development Kit
Amazon |
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Summary |
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References | () https://github.com/aws/aws-cdk/blob/d16482fc8a4a3e1f62751f481b770c09034df7d2/packages/%40aws-cdk/custom-resource-handlers/lib/aws-iam/oidc-handler/external.ts#L34 - Product | |
References | () https://github.com/aws/aws-cdk/issues/32920 - Issue Tracking | |
References | () https://github.com/aws/aws-cdk/security/advisories/GHSA-v4mq-x674-ff73 - Vendor Advisory |
17 Jan 2025, 21:15
Type | Values Removed | Values Added |
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New CVE |
Information
Published : 2025-01-17 21:15
Updated : 2025-09-19 18:45
NVD link : CVE-2025-23206
Mitre link : CVE-2025-23206
CVE.ORG link : CVE-2025-23206
JSON object : View
Products Affected
amazon
- aws_cloud_development_kit
CWE
CWE-347
Improper Verification of Cryptographic Signature