CVE-2018-11768
HIGHCVE-2018-11768 is a high-severity (CVSS 7.5) Buffer Overflow vulnerability in org.apache.hadoop:hadoop-main. O3 Security confirms whether CVE-2018-11768 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
user/group information can be corrupted across storing in fsimage and reading back from fsimage
Real-World Exposure
org.apache.hadoop:hadoop-main☕org.apache.hadoop:hadoop-main☕org.apache.hadoop:hadoop-mainReal-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
In Apache Hadoop 3.1.0 to 3.1.1, 3.0.0-alpha1 to 3.0.3, 2.9.0 to 2.9.1, and 2.0.0-alpha to 2.8.4, the user/group information can be corrupted across storing in fsimage and reading back from fsimage.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.apache.hadoop:hadoop-main | ≥ 2.2.0&&< 2.8.5 | 2.8.5 |
| ☕Maven | org.apache.hadoop:hadoop-main | ≥ 2.9.0&&< 2.9.2 | 2.9.2 |
| ☕Maven | org.apache.hadoop:hadoop-main | ≥ 3.0.0&&< 3.1.1 | 3.1.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.hadoop:hadoop-main. 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.apache.hadoop:hadoop-main to 2.8.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-11768 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-2018-11768 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-2018-11768. 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-2018-11768 in your dependencies?
O3 detects CVE-2018-11768 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.