### [CVE-2018-17244](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-17244)
![](https://img.shields.io/static/v1?label=Product&message=Elasticsearch&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-362%3A%20Concurrent%20Execution%20using%20Shared%20Resource%20with%20Improper%20Synchronization%20('Race%20Condition')&color=brighgreen)

### Description

Elasticsearch Security versions 6.4.0 to 6.4.2 contain an error in the way request headers are applied to requests when using the Active Directory, LDAP, Native, or File realms. A request may receive headers intended for another request if the same username is being authenticated concurrently; when used with run as, this can result in the request running as the incorrect user. This could allow a user to access information that they should not have access to.

### POC

#### Reference
- https://www.elastic.co/community/security
- https://www.elastic.co/community/security

#### Github
No PoCs found on GitHub currently.