CVE-2021-36749

Description

In the Druid ingestion system, the InputSource is used for reading data from a certain data source. However, the HTTP InputSource allows authenticated users to read data from other sources than intended, such as the local file system, with the privileges of the Druid server process. This is not an elevation of privilege when users access Druid directly, since Druid also provides the Local InputSource, which allows the same level of access. But it is problematic when users interact with Druid indirectly through an application that allows users to specify the HTTP InputSource, but not the Local InputSource. In this case, users could bypass the application-level restriction by passing a file URL to the HTTP InputSource. This issue was previously mentioned as being fixed in 0.21.0 as per CVE-2021-26920 but was not fixed in 0.21.0 or 0.21.1.

NVD

Severity: MEDIUM
CVE ID: CVE-2021-36749
CVSS Score: 6.5
CVSS Metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Refrence: NVDMITRE

Proof Of Concept

Nuclei Templates for CVE-2021-36749

Refrence: Project Discovery GitHub

sma11new

漏洞POC、EXP合集，持续更新。Apache Druid-任意文件读取（CVE-2021-36749）、ConfluenceRCE（CVE-2021-26084）、ZeroShell防火墙RCE（CVE-2019-12725）、ApacheSolr任意文件读取、蓝凌OA任意文件读取、phpStudyRCE、ShowDoc任意文件上传、原创先锋后台未授权、Kyan账号密码泄露、TerraMasterTos任意文件读取、TamronOS-IPTV系统RCE、Wayos防火墙账号密码泄露

Refrence: GitHub

BrucessKING

Apache Druid 任意文件读取

Refrence: GitHub

dorkerdevil

Refrence: GitHub

zwlsix

CVE-2021-36749 Docker 漏洞复现

Refrence: GitHub

Jun-5heng

Apache Druid LoadData 任意文件读取漏洞 / Code By:Jun_sheng

Refrence: GitHub