CVE - CVE-2020-8912

CVE-ID
CVE-2020-8912	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
A vulnerability in the in-band key negotiation exists in the AWS S3 Crypto SDK for GoLang versions prior to V2. An attacker with write access to the targeted bucket can change the encryption algorithm of an object in the bucket, which can then allow them to change AES-GCM to AES-CTR. Using this in combination with a decryption oracle can reveal the authentication key used by AES-GCM as decrypting the GMAC tag leaves the authentication key recoverable as an algebraic equation. It is recommended to update your SDK to V2 or later, and re-encrypt your files.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://aws.amazon.com/blogs/developer/updates-to-the-amazon-s3-encryption-client/?s=09 URL:https://aws.amazon.com/blogs/developer/updates-to-the-amazon-s3-encryption-client/?s=09 CONFIRM:https://github.com/google/security-research/security/advisories/GHSA-7f33-f4f5-xwgw URL:https://github.com/google/security-research/security/advisories/GHSA-7f33-f4f5-xwgw
Assigning CNA
Google LLC
Date Record Created
20200212	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20200212)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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