CVE-2020-5412
MEDIUMCVE-2020-5412 is a medium-severity (CVSS 6.5) CWE-441 vulnerability in org.springframework.cloud:spring-cloud-netflix. O3 Security confirms whether CVE-2020-5412 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Externally Controlled Reference to a Resource in Another Sphere and Confused Deputy in Spring Cloud Netflix
Real-World Exposure
org.springframework.cloud:spring-cloud-netflix☕org.springframework.cloud:spring-cloud-netflixReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
Spring Cloud Netflix, versions 2.2.x prior to 2.2.4, versions 2.1.x prior to 2.1.6, and older unsupported versions allow applications to use the Hystrix Dashboard proxy.stream endpoint to make requests to any server reachable by the server hosting the dashboard. A malicious user, or attacker, can send a request to other servers that should not be exposed publicly.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.springframework.cloud:spring-cloud-netflix | ≥ 2.2.0&&< 2.2.4 | 2.2.4 |
| ☕Maven | org.springframework.cloud:spring-cloud-netflix | ≥ 2.1.0&&< 2.1.6 | 2.1.6 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.springframework.cloud:spring-cloud-netflix. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update org.springframework.cloud:spring-cloud-netflix to 2.2.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-5412 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2020-5412 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2020-5412. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2020-5412 in your dependencies?
O3 detects CVE-2020-5412 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.