External risk intelligence

Sunhillo SureLine OS Command Injection Vulnerability.

CVE advisoryKnown Exploit

CVE-2021-36380

Sunhillo SureLine has an operating system command injection vulnerability. Attackers can exploit this flaw to execute commands on affected systems, leading to potential system compromise and operational disruptions. This poses a significant business risk to organizations using the vulnerable product.

4Halo Surface Signal

OS Command Injection

Sunhillo Sureline

before 8.7.0.1.1

External exposure likelihood

Halo Surface Signal score for CVE-2021-36380

The vulnerability exists in a CGI script within an appliance management interface. Such interfaces are commonly deployed as web-based administrative portals, which are frequently exposed to network access in gateway or edge service roles to facilitate remote management and connectivity.

Horizon Alert

Summary of the vulnerability and why it matters

The Sunhillo SureLine product contains a vulnerability that allows for unauthenticated operating system command injection. This flaw enables attackers to execute commands on the affected system. The potential business impact includes unauthorized access, system compromise, and disruption of operations.

  • Vulnerable: Sunhillo SureLine
  • Flaw: OS command injection
  • Impact: System compromise, operational disruption

Attack Path

How an attacker could exploit the issue

This vulnerability allows an unauthenticated attacker to inject operating system commands through specific input fields in a network diagnostic script. Such an attacker could leverage this to execute arbitrary commands on the affected system. The successful exploitation of this vulnerability could lead to significant business risk by compromising system integrity and enabling further malicious activities.

  • Unauthenticated network access to a diagnostic script.
  • Attacker submits malicious input.
  • Commands execute on the system.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability presents a critical risk due to the potential for unauthenticated attackers to inject operating system commands. Successful exploitation could lead to unauthorized access, modification, or destruction of data, and potentially allow attackers to maintain persistence within affected systems. The ease of exploitation and the severity of potential impact suggest a high level of business risk.

  • Attackers with basic skills.
  • No access or conditions needed.
  • High business risk; treat as urgent.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

An unauthenticated command injection vulnerability has been identified in Sunhillo SureLine, potentially allowing attackers to execute arbitrary commands. This poses a significant risk to affected organizations, potentially leading to unauthorized system access, data compromise, and disruption of services. The vulnerability is present in versions prior to 8.7.0.1.1.

  • Find exposed SureLine instances.
  • Reduce exposure or isolate affected systems.
  • Apply vendor updates and validate.
  • Monitor for related malicious activity.

Frequently asked questions

What is Sunhillo SureLine and its purpose?

Sunhillo SureLine is a network diagnostic and management product. It provides tools to examine network connectivity and configurations, aiding users in identifying and resolving network issues.

How does CVE-2021-36380 affect Sunhillo SureLine?

CVE-2021-36380 details an OS command injection vulnerability (CWE-78) in Sunhillo SureLine. This flaw allows an unauthenticated attacker to inject and execute operating system commands on the vulnerable device.

What are the conditions for exploiting the CVE-2021-36380 vulnerability?

An attacker can exploit this vulnerability by sending shell metacharacters within the `ipAddr` or `dnsAddr` parameters of the `/cgi/networkDiag.cgi` script. This allows for unauthenticated OS command injection.

What is the relevance of CVE-2021-36380 to network security?

This critical vulnerability in Sunhillo SureLine, an appliance management interface, is exposed externally. It allows unauthenticated attackers to execute arbitrary OS commands, posing a significant risk of system compromise and operational disruption.

What steps should be taken to address the Sunhillo SureLine vulnerability?

Organizations should identify exposed SureLine instances, reduce their network exposure, or isolate affected systems. Applying vendor updates to versions 8.7.0.1.1 or later is crucial. Continuous monitoring for related malicious activity is also recommended.

References