GHSA-v4mq-x674-ff73
Suggest an improvement- Source
- https://github.com/advisories/GHSA-v4mq-x674-ff73
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-v4mq-x674-ff73/GHSA-v4mq-x674-ff73.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/GHSA-v4mq-x674-ff73
- Aliases
-
- CVE-2025-23206
- Published
- 2025-01-17T21:22:25Z
- Modified
- 2025-01-17T21:58:15.585244Z
- Severity
-
- 1.8 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- AWS Cloud Development Kit (AWS CDK) IAM OIDC custom resource allows connection to unauthorized OIDC provider
- Details
-
Impact
Users who use IAM OIDC custom resource provider package will download CA Thumbprints as part of the custom resource workflow, https://github.com/aws/aws-cdk/blob/d16482fc8a4a3e1f62751f481b770c09034df7d2/packages/%40aws-cdk/custom-resource-handlers/lib/aws-iam/oidc-handler/external.ts#L34.
However, the current
tls.connectmethod will always setrejectUnauthorized: falsewhich is a potential security concern. CDK should follow the best practice and setrejectUnauthorized: 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.
As a best practice, CDK should still fix this issue under a feature flag to avoid regression.
packages/@aws-cdk/custom-resource-handlers/lib/aws-iam/oidc-handler/external.ts ❯❱ problem-based-packs.insecure-transport.js-node.bypass-tls-verification.bypass-tls-verification Checks for setting the environment variable NODE_TLS_REJECT_UNAUTHORIZED to 0, which disables TLS verification. This should only be used for debugging purposes. Setting the option rejectUnauthorized to false bypasses verification against the list of trusted CAs, which also leads to insecure transport.Patches
The patch is in progress. To mitigate, upgrade to CDK v2.177.0 (Expected release date 2025-02-22). Once upgraded, please make sure the feature flag '@aws-cdk/aws-iam:oidcRejectUnauthorizedConnections' is set to true in
cdk.context.jsonorcdk.json. More details on feature flag setting is here.Workarounds
N/A
References
https://github.com/aws/aws-cdk/issues/32920
- Database specific
{ "nvd_published_at": "2025-01-17T21:15:12Z", "cwe_ids": [ "CWE-347" ], "severity": "LOW", "github_reviewed": true, "github_reviewed_at": "2025-01-17T21:22:25Z" }- References
-
- https://github.com/aws/aws-cdk/security/advisories/GHSA-v4mq-x674-ff73
- https://nvd.nist.gov/vuln/detail/CVE-2025-23206
- https://github.com/aws/aws-cdk/issues/32920
- https://github.com/aws/aws-cdk/commit/3e4f3773bfa48b75bf0adc7d53d46bbec7714a9e#diff-38a03353f201fd2e520df67fb43f9f000257bffd6e9acaa5569cce7005a77560
- https://docs.aws.amazon.com/cdk/v2/guide/featureflags.html
- https://github.com/aws/aws-cdk
- https://github.com/aws/aws-cdk/blob/d16482fc8a4a3e1f62751f481b770c09034df7d2/packages/%40aws-cdk/custom-resource-handlers/lib/aws-iam/oidc-handler/external.ts#L34
Affected packages
npm / aws-cdk-lib
Package
- Name
- aws-cdk-lib
- View open source insights on deps.dev
- Purl
- pkg:npm/aws-cdk-lib