AWS S3 Crypto SDK sends an unencrypted hash of the plaintext alongside the ciphertext as a metadata field

GHSA-6jvc-q2x7-pchv · CVE-2022-2582 · GHSA-76wf-9vgp-pj7w · GO-2022-0391

Published Dec 28, 2022 · Modified Feb 4, 2026

Description

The AWS S3 Crypto SDK sends an unencrypted hash of the plaintext alongside the ciphertext as a metadata field. This hash can be used to brute force the plaintext, if the hash is readable to the attacker. AWS now blocks this metadata field, but older SDK versions still send it.

References

WEB https://github.com/google/security-research/security/advisories/GHSA-76wf-9vgp-pj7w
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2022-2582
WEB https://github.com/aws/aws-sdk-go/commit/35fa6ddf45c061e0f08d3a3b5119f8f4da38f6d1
PACKAGE https://github.com/aws/aws-sdk-go
WEB https://pkg.go.dev/vuln/GO-2022-0391

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