Vulnerabilities > CVE-2018-17207 - Code Injection vulnerability in Snapcreek Duplicator

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
snapcreek
CWE-94
metasploit

Summary

An issue was discovered in Snap Creek Duplicator before 1.2.42. By accessing leftover installer files (installer.php and installer-backup.php), an attacker can inject PHP code into wp-config.php during the database setup step, achieving arbitrary code execution.

Vulnerable Configurations

Part Description Count
Application
Snapcreek
77

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Manipulating User-Controlled Variables
    This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.

Metasploit

descriptionWhen the WordPress plugin Snap Creek Duplicator restores a backup, it leaves dangerous files in the filesystem such as installer.php and installer-backup.php. These files allow anyone to call a function that overwrite the wp-config.php file AND this function does not sanitize POST parameters before inserting them inside the wp-config.php file, leading to arbitrary PHP code execution. WARNING: This exploit WILL break the wp-config.php file. If possible try to restore backups of the configuration after the exploit to make the WordPress site work again.
idMSF:EXPLOIT/MULTI/PHP/WP_DUPLICATOR_CODE_INJECT
last seen2020-06-14
modified2019-08-02
published2018-12-11
references
reporterRapid7
sourcehttps://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/multi/php/wp_duplicator_code_inject.rb
titleSnap Creek Duplicator WordPress plugin code injection

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/150765/wp_duplicator_code_inject.rb.txt
idPACKETSTORM:150765
last seen2018-12-12
published2018-12-12
reporterThomas Chauchefoin
sourcehttps://packetstormsecurity.com/files/150765/WordPress-Snap-Creek-Duplicator-Code-Injection.html
titleWordPress Snap Creek Duplicator Code Injection