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.
References (2)
Core 2
Core References
Exploit, Mitigation, Third Party Advisory x_refsource_confirm
https://github.com/google/security-research/security/advisories/GHSA-wqgp-vphw-hphf
Vendor Advisory x_refsource_confirm
https://aws.amazon.com/blogs/security/improved-client-side-encryption-explicit-keyids-and-key-commitment/
Scores
CVSS v3
4.8
EPSS
0.0008
EPSS Percentile
23.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
Details
CWE
CWE-310
CWE-327
Status
published
Products (3)
amazon/aws_encryption_sdk
< 2.0.0
com.amazonaws/aws-encryption-sdk-java
0 - 2.0.0Maven
pypi/aws-encryption-sdk
0 - 2.0.0PyPI
Published
Nov 16, 2020
Tracked Since
Feb 18, 2026