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Low severity2.5NVD Advisory· Published Aug 11, 2020· Updated Jun 17, 2026

CVE-2020-8912

CVE-2020-8912

Description

A vulnerability in the in-band key negotiation exists in the AWS S3 Crypto SDK for GoLang versions prior to V2. An attacker with write access to the targeted bucket can change the encryption algorithm of an object in the bucket, which can then allow them to change AES-GCM to AES-CTR. Using this in combination with a decryption oracle can reveal the authentication key used by AES-GCM as decrypting the GMAC tag leaves the authentication key recoverable as an algebraic equation. It is recommended to update your SDK to V2 or later, and re-encrypt your files.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/aws/aws-sdk-goGo
< 1.34.01.34.0

Affected products

547

Patches

Vulnerability mechanics

References

10

News mentions

0

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