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Published: 16/11/2020 Updated: 02/12/2020

CVSS v2 Base Score: 5.5 | Impact Score: 4.9 | Exploitability Score: 8

CVSS v3 Base Score: 8.1 | Impact Score: 5.2 | Exploitability Score: 2.8

VMScore: 490

Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N

A weak robustness vulnerability exists in the AWS Encryption SDKs for Java, Python, C and Javalcript prior to versions 2.0.0. Due to the non-committing property of AES-GCM (and other AEAD ciphers such as AES-GCM-SIV or (X)ChaCha20Poly1305) used by the SDKs to encrypt messages, an attacker can craft a unique cyphertext which will decrypt to multiple different results, and becomes especially relevant in a multi-recipient setting. We recommend users update their SDK to 2.0.0 or later.

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amazon aws encryption sdk

CWE-327 https://aws.amazon.com/blogs/security/improved-client-side-encryption-explicit-keyids-and-key-commitment/https://github.com/google/security-research/security/advisories/GHSA-wqgp-vphw-hphf https://nvd.nist.gov

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CVE-2020-8897

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