CVE-2024-5891
📋 TL;DR
This vulnerability in Quay allows attackers who obtain an application's client ID to use OAuth tokens for authentication, potentially accessing applications they shouldn't have access to. It affects systems where endpoints rely solely on authentication rather than proper authorization checks. Organizations using Quay with OAuth authentication are impacted.
💻 Affected Systems
- Quay
📦 What is this software?
Quay by Redhat
⚠️ Risk & Real-World Impact
Worst Case
Unauthorized users gain access to sensitive applications and data by bypassing authentication controls, potentially leading to data breaches or privilege escalation.
Likely Case
Limited unauthorized access to specific applications where authentication alone is used for access control, without broader system compromise.
If Mitigated
Minimal impact if proper authorization checks are implemented alongside authentication, limiting access to authorized users only.
🎯 Exploit Status
Requires obtaining client ID for targeted application; exploitation depends on specific OAuth configuration.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Red Hat advisories for specific patched versions
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2024-5891
Restart Required: Yes
Instructions:
1. Check Red Hat advisory for patched Quay versions. 2. Update Quay to recommended version. 3. Restart Quay services. 4. Verify fix implementation.
🔧 Temporary Workarounds
Implement Authorization Checks
allEnsure all endpoints implement proper authorization checks in addition to authentication.
Restrict Client ID Access
allLimit access to client IDs and monitor for unauthorized OAuth token usage.
🧯 If You Can't Patch
- Implement network segmentation to isolate Quay instances from sensitive systems
- Enable detailed logging and monitoring for OAuth authentication attempts
🔍 How to Verify
Check if Vulnerable:
Check Quay version against Red Hat advisory; review OAuth configuration for authentication-only endpoints.Check Version:
docker exec quay-registry quay --version or check Quay configuration filesVerify Fix Applied:
Verify Quay version is updated to patched version; test OAuth authentication with proper authorization checks.📡 Detection & Monitoring
Log Indicators:
- Unusual OAuth authentication attempts
- Authentication from unexpected client IDs
- Failed authorization checks following successful authentication
Network Indicators:
- Unexpected OAuth token usage patterns
- Authentication requests to restricted endpoints
SIEM Query:
source="quay" AND (event_type="authentication" AND result="success") AND NOT (event_type="authorization" AND result="success")