High, CVSS 7.7NuGetPublished
AWS SDK for .NET: Improper escaping of special characters in CloudFront policy document construction
GHSA-mvm6-f9r3-fgfx
- Affected
- NuGet awssdk.extensions.cloudfront.signers >= 4.0.0.0, < 4.0.0.26
- Fixed in
- 4.0.0.26· Vendor fix available
- Issue
- This notification is related to the CloudFront signing utilities in the AWS SDK for .NET, which are used to generate Amazon CloudFront signed URLs and signed cookies. A defense-in-depth enhancement has been implemented to improve handling of special characters, such as double quotes and backslashes, in input values. Impact The CloudFront signing utilities build policy documents that define access restrictions for signed URLs and cookies. If an application passes unsanitized input containing special characters to these utilities, the resulting policy document may not reflect the application's intended access restrictions. While the SDK was functioning safely within the requirements of the shared responsibility model, additional safeguards have been added to support secure customer implementations. Applications that already follow AWS security best practices for input validation are not impacted. Impacted versions: - AWS SDK for .NET V3 (AWSSDK.CloudFront): < 3.7.510.7 - AWS…
Recommended action: Upgrade to 4.0.0.26 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.