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How the CVE Works
Vert.x 4.5.12 altered the behavior of duplicated context duplication. Previously, duplicating a context created an empty, isolated instance for new transactions. The update now copies parent context data into the new instance, risking data leaks between transactions. Quarkus heavily relies on this for context propagation, exposing request scope, security details, and metadata. Vulnerable scenarios include Quarkus Messaging connectors, where unintended data sharing may occur. The Vert.x team plans to revert this change in 4.x and introduce a clarified API in Vert.x 5.
DailyCVE Form
Platform: Vert.x
Version: 4.5.12
Vulnerability: Context data leak
Severity: Critical
Date: 2024-XX-XX
Prediction: Patch by Q2 2024
What Undercode Say
// Check current context ContextInternal ctx = (ContextInternal) Vertx.currentContext(); // Safe duplication (workaround) ContextInternal safeCopy = ctx.duplicate(); // Quarkus REST Client OTel usage VertxContext.getRootContext(ctx).duplicate();
How Exploit
- Trigger transaction in Quarkus Messaging.
- Parent context data leaks into child.
- Extract security/metadata via crafted request.
Protection from this CVE
- Apply Vert.x 4.x patch post-release.
- Use
((ContextInternal) VertxContext.getRootContext(ctx)).duplicate(). - Upgrade Quarkus post-fix integration.
Impact
- Cross-transaction data leaks.
- Exposed security/metadata.
- Affects Quarkus messaging/health.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
