Vulnerabilities > CVE-2020-8644 - Code Injection vulnerability in Playsms

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
playsms
CWE-94
exploit available
metasploit

Summary

PlaySMS before 1.4.3 does not sanitize inputs from a malicious string.

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.

Exploit-Db

idEDB-ID:48335
last seen2020-04-16
modified2020-04-16
published2020-04-16
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/48335
titlePlaySMS - index.php Unauthenticated Template Injection Code Execution (Metasploit)

Metasploit

descriptionThis module exploits a preauth Server-Side Template Injection vulnerability that leads to remote code execution in PlaySMS before version 1.4.3. This issue is caused by double processing a server-side template with a custom PHP template system called 'TPL' which is used in the PlaySMS template engine at `src/Playsms/Tpl.php:_compile()`. The vulnerability is triggered when an attacker supplied username with a malicious payload is submitted. This malicious payload is then stored in a TPL template which when rendered a second time, results in code execution. The TPL(https://github.com/antonraharja/tpl) template language is vulnerable to PHP code injection. This module was tested against PlaySMS 1.4 on HackTheBox's Forlic Machine.
idMSF:EXPLOIT/MULTI/HTTP/PLAYSMS_TEMPLATE_INJECTION
last seen2020-06-14
modified2020-04-03
published2020-04-03
references
reporterRapid7
sourcehttps://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/multi/http/playsms_template_injection.rb
titlePlaySMS index.php Unauthenticated Template Injection Code Execution

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/157106/playsms_template_injection.rb.txt
idPACKETSTORM:157106
last seen2020-04-08
published2020-04-06
reporterTouhid M.Shaikh
sourcehttps://packetstormsecurity.com/files/157106/PlaySMS-index.php-Unauthenticated-Template-Injection-Code-Execution.html
titlePlaySMS index.php Unauthenticated Template Injection Code Execution