CVE-2020-8897 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Reference

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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

8.1