CVE-2018-11778 UnixAuthenticationService in Apache Ranger was updated to correctly handle user input to avoid Stack-based buffer overflow

What is CVE-2018-11778?

CVE-2018-11778 is a high-severity memory corruption vulnerability in Apache Ranger, published on 5 Oct 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

UnixAuthenticationService in Apache Ranger 1.2.0 was updated to correctly handle user input to avoid Stack-based buffer overflow. Versions prior to 1.2.0 should be upgraded to 1.2.0

Weakness: CWE-787

Which versions are affected by CVE-2018-11778?

2 open source packages ship an affected version, including org.apache.ranger:ranger. It affects 1 product.

Products include Apache Ranger.

How do I fix CVE-2018-11778?

Upgrade org.apache.ranger:ranger to 1.2.0 or later.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-11778 being exploited?

There is no known exploitation of CVE-2018-11778 in the wild and no public exploit code.

Other vulnerabilities in Apache Ranger

• CVE-2026-28672 Apache Ranger: OS Command Injection via Username in UnixUserGroupBuilder Critical 9.8
• CVE-2026-32227 Apache Ranger: SQL Injection vulnerability in lookup functionality Critical 9.8
• CVE-2026-40920 Apache Ranger: Privilege Escalation via URL Parameter Critical 9.8
• CVE-2026-42537 Apache Ranger: Remote Code Execution via JDBC URL Injection Critical 9.8
• CVE-2026-44416 Apache Ranger: Remote Code Execution via Arbitrary Class Instantiation Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-c99h-fgqm-6679.