CVE-2018-11766
Description
In Apache Hadoop 2.7.4 to 2.7.6, the security fix for CVE-2016-6811 is incomplete. A user who can escalate to yarn user can possibly run arbitrary commands as root user.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Incomplete fix for CVE-2016-6811 in Apache Hadoop 2.7.4-2.7.6 allows a user with yarn privilege escalation to execute arbitrary commands as root.
Vulnerability
In Apache Hadoop versions 2.7.4 through 2.7.6, the security fix for CVE-2016-6811 is incomplete. This vulnerability resides in the YARN component, where a user who can escalate to the yarn user can potentially run arbitrary commands as root. [1][2]
Exploitation
An attacker must first gain the ability to escalate to the yarn user, which may require prior access or another vulnerability. Once achieved, the attacker can exploit the incomplete fix to execute arbitrary commands with root privileges. The exact sequence of steps is not detailed in the available references. [1][2]
Impact
Successful exploitation allows an attacker to execute arbitrary commands as the root user, leading to full compromise of the Hadoop cluster. This results in complete loss of confidentiality, integrity, and availability. [1][2]
Mitigation
Upgrade to a fixed version of Apache Hadoop beyond 2.7.6, such as 2.7.7 or later. No workaround is mentioned. As of the publication date (2018-11-27), users should upgrade to avoid the risk. [1][2]
AI Insight generated on May 22, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.apache.hadoop:hadoop-mainMaven | >= 2.7.4, < 2.7.7 | 2.7.7 |
Affected products
2- Apache Software Foundation/Apache Hadoopv5Range: Apache Hadoop 2.7.4 to 2.7.6
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- github.com/advisories/GHSA-rqj9-cq6j-958rghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2018-11766ghsaADVISORY
- www.securityfocus.com/bid/106035ghsavdb-entryx_refsource_BIDWEB
- lists.apache.org/thread.html/ff37bbbe09d5f03090e2dd2c3dea95de16ef4249e731f19b8959ce4c%40%3Cgeneral.hadoop.apache.org%3Emitrex_refsource_MISC
- lists.apache.org/thread.html/ff37bbbe09d5f03090e2dd2c3dea95de16ef4249e731f19b8959ce4c@%3Cgeneral.hadoop.apache.org%3EghsaWEB
News mentions
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