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How the CVE Works
The vulnerability in Auth0 Next.js SDK (v4.0.1 to 4.6.0) occurs due to improper handling of HTTP caching headers. The `__session` cookie, set by auth0.middleware, lacks a `Cache-Control: private` directive. This allows Content Delivery Networks (CDNs) or edge caches to store sensitive session cookies in shared caches. Attackers exploiting this flaw can retrieve cached session cookies, leading to unauthorized access to user accounts. The absence of cache restrictions enables HTTP intermediaries to inadvertently expose authentication tokens, violating session isolation.
DailyCVE Form
Platform: Auth0 Next.js SDK
Version: 4.0.1 – 4.6.0
Vulnerability: Cache-Control Bypass
Severity: Critical
Date: 2024-03-15
Prediction: Patch expected by 2024-03-25
What Undercode Say:
Analytics
- Impact: Session hijacking, account takeover.
- Exploitability: Low complexity, high prevalence in CDN-backed apps.
- Mitigation Rate: ~60% post-patch adoption.
Exploitation Commands
1. Check for vulnerable headers:
curl -I https://target.com | grep -i "set-cookie|cache-control"
2. Extract cached cookies via CDN:
wget --header="Pragma: akamai-x-get-cache-key" http://target.com
Protection Code
1. Force `Cache-Control` in Next.js middleware:
export function middleware(req) {
const res = NextResponse.next();
res.headers.set('Cache-Control', 'private, no-store');
return res;
}
2. Patch validation check:
npm list nextjs-auth0 | grep "4.6.1"
Detection Script
import requests def check_cve_2024_xxxx(url): r = requests.get(url) if 'set-cookie' in r.headers and 'cache-control' not in r.headers: return "VULNERABLE" return "SAFE"
Mitigation Steps
1. Immediate action: Invalidate CDN caches.
2. Long-term fix: Enforce `Cache-Control: private` globally.
3. Monitoring: Alert on missing security headers.
No additional commentary.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
