Vulnerability in Amazon Aws Encryption Sdk
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.
Vulnerability class: POODLE (CVE-2014-3566)
EPSS: 0.004 (32.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Amazon Aws_encryption_sdk
- Amazon Aws Sdk — versions stable
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve-coordination@google.com (x_refsource_CONFIRM, Exploit, Third Party Advisory, Mitigation)
- cve-coordination@google.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-8897?
- CVE-2020-8897 is a medium-severity vulnerability in Amazon Aws Encryption Sdk, classified under Cryptographic Issues. CVSS score: 4.8/10. Published 2020-11-16.
- How severe is CVE-2020-8897?
- Medium severity. CVSS v3 base score is 4.8 out of 10.
- Is CVE-2020-8897 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.