External risk intelligence

ThinkPHP Remote Command Execution Vulnerability.

CVE advisoryKnown Exploit

CVE-2019-9082

Remote command execution is possible in certain versions of ThinkPHP and associated products like Open Source BMS. This allows attackers to run commands on affected systems, posing a risk of data compromise and operational disruption. The U.S. CISA has listed this as an actively exploited vulnerability.

4Halo Surface Signal

Code Injection

Thinkphp

before 3.2.41.1.11.6.1

External exposure likelihood

Halo Surface Signal score for CVE-2019-9082

The vulnerability affects web application frameworks and content management systems designed to serve public web traffic. Because these products are commonly deployed as internet-facing web applications or web-accessible back-end interfaces, they are frequently reachable from the public internet in standard deployment patterns.

Horizon Alert

Summary of the vulnerability and why it matters

Certain versions of ThinkPHP, a web application framework, and products that use it, such as Open Source BMS, are vulnerable to remote command execution. This flaw allows an unauthenticated attacker to execute arbitrary commands on the affected system. The impact can include unauthorized access to sensitive data, modification of system configurations, and disruption of business operations.

  • Vulnerable web application framework
  • Allows remote command execution
  • Potential for data compromise and disruption

Attack Path

How an attacker could exploit the issue

The vulnerability allows an attacker to execute arbitrary commands on the affected system. This occurs when the application fails to properly sanitize user input, enabling the attacker to inject malicious commands through specific function calls within the application's logic. Successful exploitation can lead to the execution of commands chosen by the attacker, potentially compromising the integrity and confidentiality of the system.

  • External network access required.
  • Unauthenticated attacker gains control.
  • Attacker executes commands.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability allows an attacker to execute arbitrary commands on affected systems. The risk is heightened because this can be achieved remotely without authentication, potentially leading to compromised data and systems. Organizations should prioritize addressing this vulnerability due to its potential for severe business impact. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has identified this vulnerability as actively exploited.

  • Attackers with moderate skill.
  • No authentication required.
  • High business risk and urgency.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability may allow attackers to execute commands on affected systems. Organizations should prioritize identifying and securing exposed assets. Addressing this vulnerability is critical to preventing potential compromise.

  • Find affected systems and applications.
  • Limit network access to vulnerable services.
  • Apply vendor updates and confirm remediation.
  • Monitor for related malicious activity.

Frequently asked questions

What is the ThinkPHP vulnerability and which versions are affected by this remote command execution flaw?

ThinkPHP versions prior to 3.2.4 are vulnerable to remote command execution. This flaw affects the web application framework itself and products that utilize it, such as Open Source BMS version 1.1.1 and ZZZPHP version 1.6.1. The vulnerability allows attackers to execute arbitrary system commands.

What is the weakness class for CVE-2019-9082, and how does it enable remote command execution?

CVE-2019-9082 has two identified weakness classes: CWE-94 (Improper Control of Generation of Code 'Code Injection') and CWE-306 (Not Attempting to Authenticate or Authorize). These weaknesses allow an unauthenticated attacker to inject commands through specific function calls in ThinkPHP, leading to arbitrary command execution.

What is the trigger path for remote command execution in ThinkPHP, and does it require authentication?

The trigger path involves a specific URL structure: public//?s=index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]= followed by the command to be executed. This vulnerability can be exploited by an unauthenticated attacker, meaning no prior login or privileges are required.

Why is the ThinkPHP remote command execution vulnerability considered a significant threat?

This vulnerability poses a significant threat because it allows remote command execution without authentication, potentially leading to unauthorized access, data compromise, and disruption of operations. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has also identified it as actively exploited, increasing the urgency for remediation.

What are the recommended steps to address the ThinkPHP remote command execution vulnerability?

Organizations should prioritize identifying all affected systems and applications. It is crucial to limit network access to vulnerable services and apply vendor-provided updates or patches. After remediation, confirm that the vulnerability has been successfully addressed and continue to monitor for any related malicious activity.

References