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How the CVE Works
The vulnerability occurs when the Amazon Redshift Python Connector uses the `BrowserAzureOAuth2CredentialsProvider` plugin for authentication. The driver fails to enforce SSL certificate validation during token exchange with the Identity Provider (IdP). This allows man-in-the-middle (MITM) attackers to intercept OAuth2 tokens by presenting a self-signed or invalid certificate. Since the connection is not properly secured, attackers can steal access tokens and impersonate legitimate users, potentially gaining unauthorized database access. The flaw affects versions 2.0.872 to 2.1.6.
DailyCVE Form
Platform: Amazon Redshift
Version: 2.0.872-2.1.6
Vulnerability: SSL bypass
Severity: Critical
Date: 2023-XX-XX
Prediction: Patch by 2023-XX-XX
What Undercode Say:
Exploitation:
- MITM Setup: Use tools like `mitmproxy` to intercept traffic between the connector and IdP.
- Fake Certificate: Deploy a rogue SSL certificate to bypass validation.
- Token Capture: Extract OAuth2 tokens from unencrypted traffic.
Protection:
1. Immediate Upgrade:
pip install redshift-connector==2.1.7
2. Certificate Pinning: Enforce strict certificate checks in custom OAuth2 handlers.
import ssl context = ssl.create_default_context() context.verify_mode = ssl.CERT_REQUIRED
3. Network Controls: Restrict outbound traffic to trusted IdP endpoints.
Detection:
- Log Analysis: Monitor for unusual token requests or mismatched certificates.
- Script Check: Verify connector version in use:
import redshift_connector print(redshift_connector.<strong>version</strong>)
AWS-Specific Mitigations:
- IAM Policies: Limit token scope to least privilege.
- CloudTrail: Enable logging for Redshift API calls.
References:
- AWS Security Advisory: [bash]
- CVE Details: [bash]
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
