Vulnerability Details CVE-2020-8897
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 23.9%
CVSS Severity
CVSS v3 Score 4.8
CVSS v2 Score 5.5
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
Products affected by CVE-2020-8897
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cpe:2.3:a:amazon:aws_encryption_sdk:-
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cpe:2.3:a:amazon:aws_encryption_sdk:0.0.1
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cpe:2.3:a:amazon:aws_encryption_sdk:1.3.0
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cpe:2.3:a:amazon:aws_encryption_sdk:1.3.1
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cpe:2.3:a:amazon:aws_encryption_sdk:1.3.2
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cpe:2.3:a:amazon:aws_encryption_sdk:1.3.3
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cpe:2.3:a:amazon:aws_encryption_sdk:1.3.4
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cpe:2.3:a:amazon:aws_encryption_sdk:1.3.5
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cpe:2.3:a:amazon:aws_encryption_sdk:1.3.6
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cpe:2.3:a:amazon:aws_encryption_sdk:1.4.0
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cpe:2.3:a:amazon:aws_encryption_sdk:1.4.1
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cpe:2.3:a:amazon:aws_encryption_sdk:1.5.0
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cpe:2.3:a:amazon:aws_encryption_sdk:1.6.0
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cpe:2.3:a:amazon:aws_encryption_sdk:1.6.1
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cpe:2.3:a:amazon:aws_encryption_sdk:1.6.2
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cpe:2.3:a:amazon:aws_encryption_sdk:1.7.0
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cpe:2.3:a:amazon:aws_encryption_sdk:1.9.0
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cpe:2.3:a:amazon:aws_encryption_sdk:1.9.1
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cpe:2.3:a:amazon:aws_encryption_sdk:1.9.2