CVSS 3.1
8.1 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NCVE-2020-8897
High (8.1) in amazon aws encryption sdk. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in com.amazonaws:aws-encryption-sdk-java 2.0.0.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 34% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-327, CWE-310
- Published
- Modified
- Record from
- the NVD, synced
Affected
- amazon:aws_encryption_sdk
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wqgp-vphw-hphf | Maven | com.amazonaws:aws-encryption-sdk-java | <2.0.0 | 2.0.0 |
| GHSA-wqgp-vphw-hphf | PyPI | aws-encryption-sdk | <2.0.0 | 2.0.0 |
| PYSEC-2020-261 | PyPI | aws-encryption-sdk | <2.0.0 | 2.0.0 |
References
- 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://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