External risk intelligence

rConfig OS Command Execution Vulnerability

CVE advisoryKnown Exploit

CVE-2020-10221

An unauthenticated vulnerability in rConfig allows remote attackers to execute commands on affected systems. This impacts organizations using specific versions of the software, potentially leading to unauthorized access, data modification, or service disruption. The realistic business risk is high due to the possibilit

4Halo Surface Signal

OS Command Injection

Rconfig

3.9.4 and earlier

External exposure likelihood

Halo Surface Signal score for CVE-2020-10221

rConfig is a network configuration management tool that typically functions as a web-based application. Such management interfaces are commonly deployed as web services, making them potentially reachable via the network in administrative or operational environments.

Horizon Alert

Summary of the vulnerability and why it matters

The rConfig software contains a vulnerability within its PHP handling of template additions. This flaw allows unauthorized individuals to inject and execute operating system commands through specially crafted input. This could lead to significant disruption or compromise of the affected organization's systems and data.

  • Vulnerable: rConfig software
  • Weakness: OS command injection
  • Impact: System compromise and data loss

Attack Path

How an attacker could exploit the issue

This vulnerability allows an attacker to execute operating system commands on a vulnerable system. The attacker can exploit this by sending specially crafted data to a specific application component. This could lead to unauthorized access, modification, or deletion of data, impacting system integrity and availability. The affected component handles template additions and is accessible over the network.

  • Requires authenticated access.
  • Attacker sends malicious input.
  • Commands execute on the server.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability allows remote attackers to execute arbitrary operating system commands. This could lead to unauthorized access to systems, data theft, or disruption of services. The severity of this vulnerability is high, indicating a significant risk to affected organizations.

  • Attacker skill: Low
  • Access: Authenticated user
  • Business risk: High, urgent

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability presents a high risk, enabling remote attackers to execute arbitrary commands on affected systems. The exploit involves sending specially crafted data through the `fileName` parameter in POST requests to `lib/ajaxHandlers/ajaxAddTemplate.php`. Organizations using affected versions of rConfig should take immediate action to mitigate potential business risks.

  • Identify all instances of rConfig.
  • Restrict network access to rConfig.
  • Update to a patched version.
  • Validate that the fix is effective.
  • Monitor for suspicious activity.

Frequently asked questions

What is rConfig and its primary function in network management?

rConfig is a network configuration management tool designed to provide a web-based interface for overseeing network device configurations. It assists organizations in automating and maintaining their network infrastructure's settings.

What type of vulnerability is CVE-2020-10221 within rConfig, and what weakness does it represent?

CVE-2020-10221 in rConfig is an OS command injection vulnerability, categorized as CWE-78. This weakness allows an attacker to trick the software into executing unauthorized operating system commands on the server where rConfig is installed.

How can an attacker exploit the rConfig vulnerability, and what is the scope of the impact?

An attacker with authenticated access to the rConfig system can exploit this vulnerability by submitting specially crafted input, specifically via shell metacharacters in the 'fileName' POST parameter to 'lib/ajaxHandlers/ajaxAddTemplate.php'. This can lead to the execution of arbitrary OS commands on the server.

What is the relevance of CVE-2020-10221, and why is it a significant concern for network operations?

This vulnerability allows remote attackers with authenticated access to execute arbitrary OS commands, posing a high risk to affected systems. The exploitation requires low attacker skill, and the potential impact includes unauthorized access, data theft, or service disruption, making it a significant concern for network operations.

What practical steps should an organization take to respond to this rConfig vulnerability?

Organizations should promptly identify all rConfig installations, restrict network access to the application, and update to a patched version. It's crucial to validate the effectiveness of the applied fixes and continuously monitor for any suspicious activity to ensure the vulnerability has been mitigated.

References