CVE-2020-8897

Robustness weakness in AWS KMS and Encryption SDKs

Medium · published November 16, 2020

CVSS v3.1
4.8
EPSS
0%
Percentile
33.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00399 · 33.0th percentile
Published
2020-11-16T11:55Z
EPSS history
Timeline
  • 16 NOV 11:55Z
    Robustness weakness in AWS KMS and Encryption SDKs
    cvelistv5