CVE-2020-8912 : Vulnerability Insights and Analysis
Learn about CVE-2020-8912, a vulnerability in AWS S3 Crypto SDK for GoLang allowing attackers to manipulate encryption algorithms and potentially expose authentication keys. Find mitigation steps and preventive measures here.
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, potentially revealing the authentication key used by AES-GCM.
Understanding CVE-2020-8912
This CVE involves a security issue in the AWS S3 Crypto SDK for GoLang that allows an attacker to manipulate encryption algorithms.
What is CVE-2020-8912?
The vulnerability in the AWS S3 Crypto SDK for GoLang versions prior to V2 enables an attacker to alter encryption algorithms, potentially exposing sensitive authentication keys.
The Impact of CVE-2020-8912
- CVSS Base Score: 2.5 (Low Severity)
- Attack Vector: Local
- Attack Complexity: High
- Confidentiality Impact: Low
- Integrity Impact: None
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- Vector String: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Technical Details of CVE-2020-8912
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability allows an attacker to change the encryption algorithm of an object in the AWS S3 Crypto SDK for GoLang, potentially exposing the authentication key used by AES-GCM.
Affected Systems and Versions
- Affected Product: AWS S3 Crypto SDK for GoLang
- Vendor: Google LLC
- Affected Versions: Prior to V2 (<= V1)
Exploitation Mechanism
By exploiting the vulnerability, an attacker with write access to the targeted bucket can change AES-GCM to AES-CTR, potentially revealing the authentication key used by AES-GCM.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.
Immediate Steps to Take
- Update your SDK to V2 or later immediately.
- Re-encrypt your files to ensure security.
Long-Term Security Practices
- Regularly monitor and update your encryption mechanisms.
- Implement strong access controls to prevent unauthorized changes.
Patching and Updates
Stay informed about security updates and patches for the AWS S3 Crypto SDK for GoLang to address vulnerabilities promptly.