module
Endian Firewall Proxy Password Change Command Injection
| Disclosed | Created |
|---|---|
| 06/28/2015 | 05/30/2018 |
Disclosed
06/28/2015
Created
05/30/2018
Description
This module exploits an OS command injection vulnerability in a
web-accessible CGI script used to change passwords for locally-defined
proxy user accounts. Valid credentials for such an account are
required.
Command execution will be in the context of the "nobody" account, but
this account had broad sudo permissions, including to run the script
/usr/local/bin/chrootpasswd (which changes the password for the Linux
root account on the system to the value specified by console input
once it is executed).
The password for the proxy user account specified will *not* be
changed by the use of this module, as long as the target system is
vulnerable to the exploit.
Very early versions of Endian Firewall (e.g. 1.1 RC5) require
HTTP basic auth credentials as well to exploit this vulnerability.
Use the USERNAME and PASSWORD advanced options to specify these values
if required.
Versions >= 3.0.0 still contain the vulnerable code, but it appears to
never be executed due to a bug in the vulnerable CGI script which also
prevents normal use (http://jira.endian.com/browse/UTM-1002).
Versions 2.3.x and 2.4.0 are not vulnerable because of a similar bug
(http://bugs.endian.com/print_bug_page.php?bug_id=3083).
Tested successfully against the following versions of EFW Community:
1.1 RC5, 2.0, 2.1, 2.2, 2.5.1, 2.5.2.
Should function against any version from 1.1 RC5 to 2.2.x, as well as
2.4.1 and 2.5.x.
web-accessible CGI script used to change passwords for locally-defined
proxy user accounts. Valid credentials for such an account are
required.
Command execution will be in the context of the "nobody" account, but
this account had broad sudo permissions, including to run the script
/usr/local/bin/chrootpasswd (which changes the password for the Linux
root account on the system to the value specified by console input
once it is executed).
The password for the proxy user account specified will *not* be
changed by the use of this module, as long as the target system is
vulnerable to the exploit.
Very early versions of Endian Firewall (e.g. 1.1 RC5) require
HTTP basic auth credentials as well to exploit this vulnerability.
Use the USERNAME and PASSWORD advanced options to specify these values
if required.
Versions >= 3.0.0 still contain the vulnerable code, but it appears to
never be executed due to a bug in the vulnerable CGI script which also
prevents normal use (http://jira.endian.com/browse/UTM-1002).
Versions 2.3.x and 2.4.0 are not vulnerable because of a similar bug
(http://bugs.endian.com/print_bug_page.php?bug_id=3083).
Tested successfully against the following versions of EFW Community:
1.1 RC5, 2.0, 2.1, 2.2, 2.5.1, 2.5.2.
Should function against any version from 1.1 RC5 to 2.2.x, as well as
2.4.1 and 2.5.x.
Author
Ben Lincoln
Platform
Linux
References
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/efw_chpasswd_exec
msf /(c) > show actions
...actions...
msf /(c) > set ACTION < action-name >
msf /(c) > show options
...show and set options...
msf /(c) > run
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