CVE-2020-8912
CVSS V2 Low 2.1
CVSS V3 Low 2.5
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.
Overview
- CVE ID
- CVE-2020-8912
- Assigner
- cve-coordination@google.com
- Vulnerability Status
- Analyzed
- Published Version
- 2020-08-11T20:15:13
- Last Modified Date
- 2020-08-17T19:31:42
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:amazon:aws_s3_crypto_sdk:*:*:*:*:*:golang:*:* | 1 | OR | 2.0 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:N/A:N
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 2.1
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
- Attack Vector
- LOCAL
- Attack Compatibility
- HIGH
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 2.5
- Base Severity
- LOW
- Exploitability Score
- 1
- Impact Score
- 1.4
References
| Reference URL | Reference Tags |
|---|---|
| https://aws.amazon.com/blogs/developer/updates-to-the-amazon-s3-encryption-client/?s=09 | Vendor Advisory |
| https://github.com/google/security-research/security/advisories/GHSA-7f33-f4f5-xwgw | Exploit Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-8912 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8912 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 17:20:26 | Added to TrackCVE | |||
| 2022-12-04 20:50:14 | security@google.com | cve-coordination@google.com | CVE Assigner | updated |
| 2022-12-04 20:50:14 | 2020-08-11T20:15Z | 2020-08-11T20:15:13 | CVE Published Date | updated |
| 2022-12-04 20:50:14 | 2020-08-17T19:31:42 | CVE Modified Date | updated | |
| 2022-12-04 20:50:14 | Analyzed | Vulnerability Status | updated |