CVE-2020-8897: Robustness weakness in AWS KMS and Encryption SDKs
First published: Mon Nov 16 2020(Updated: )
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.
Credit: cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Amazon Aws Encryption Sdk | <2.0.0 | |
| pip/aws-encryption-sdk | <2.0.0 | 2.0.0 |
| maven/com.amazonaws:aws-encryption-sdk-java | <2.0.0 | 2.0.0 |
| <2.0.0 |
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Reference Links
- 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/vuln/detail/CVE-2020-8897
- https://aws.amazon.com/blogs/security/improved-client-side-encryption-explicit-keyids-and-key-commitment
- https://github.com/pypa/advisory-database/tree/main/vulns/aws-encryption-sdk/PYSEC-2020-261.yaml
- https://github.com/advisories/GHSA-wqgp-vphw-hphf (Advisory)
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