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.

CVSS v3 8.1 HIGH
CVSS v2.0 5.5 MEDIUM

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.5^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:P/A:N

Exploitability : 8.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://aws.amazon.com/blogs/security/improved-client-side-encryption-explicit-keyids-and-key-commitment/	Vendor Advisory
https://github.com/google/security-research/security/advisories/GHSA-wqgp-vphw-hphf	Exploit Mitigation Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:amazon:aws_encryption_sdk:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2020-11-16 12:15

Updated : 2024-02-28 18:08

NVD link : CVE-2020-8897

Mitre link : CVE-2020-8897

CVE.ORG link : CVE-2020-8897

JSON object : View

Products Affected

amazon

aws_encryption_sdk

CWE

CWE-327

Use of a Broken or Risky Cryptographic Algorithm

CWE-310

Cryptographic Issues

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