VULNERABILITY INTELLIGENCE

CVE-2020-8897

CVSS score4.8 MEDIUM

EPSS probability0.40%

CISA KEVNot currently listed

Published2020-11-16

Last modified2026-06-17

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

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.

Weakness classification

cve-coordination@google.com: CWE-310
nvd@nist.gov: CWE-327

Primary references

cve-coordination@google.com — Vendor Advisory
cve-coordination@google.com — Exploit, Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Mitigation, Third Party Advisory