GMS-2021-5: Improper Verification of Cryptographic Signature in aws-encryption-sdk

June 1, 2021

This advisory addresses several LOW severity issues with streaming signed messages and restricting processing of certain types of invalid messages.

This ESDK supports a streaming mode where callers may stream the plaintext of signed messages before the ECDSA signature is validated.

References

github.com/advisories/GHSA-x5h4-9gqw-942j
github.com/aws/aws-encryption-sdk-python/security/advisories/GHSA-x5h4-9gqw-942j

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