External risk intelligence

PlaySMS Unauthenticated Code Execution Vulnerability.

CVE advisoryKnown Exploit

CVE-2020-8644

The PlaySMS application is affected by a flaw that allows unauthorized code execution. This could impact system integrity and availability, posing a business risk through potential data breaches and service disruptions.

4Halo Surface Signal

Code Injection

Playsms

before 1.4.3

External exposure likelihood

Halo Surface Signal score for CVE-2020-8644

PlaySMS is a web-based SMS gateway application. Such applications are commonly deployed as internet-facing services to facilitate SMS messaging, API connectivity, or remote management of messaging infrastructure, making the web interface and associated endpoints routinely accessible from the public internet.

Horizon Alert

Summary of the vulnerability and why it matters

This vulnerability affects the PlaySMS application. The core issue involves the application's failure to properly validate user-supplied input, which can be exploited through specially crafted strings. This flaw could potentially lead to unauthorized code execution, impacting the confidentiality, integrity, and availability of the system.

  • Vulnerable component: PlaySMS application
  • Core weakness: Input validation failure
  • Main business impact: Unauthorized code execution

Attack Path

How an attacker could exploit the issue

This vulnerability allows an attacker to execute arbitrary code on affected systems. An attacker can exploit this by sending a specially crafted string to the application, which then processes it without proper sanitization. This can lead to unauthorized access and control over the affected organization's systems.

  • External network exposure
  • Unauthenticated network access
  • Triggering template injection for code execution

Live Threat

Current exploitation, exposure, and threat context

This vulnerability presents a significant risk to organizations using the affected software. Attackers with a high level of skill could potentially exploit this issue remotely, leading to unauthorized access and control over systems. The potential for widespread damage and disruption necessitates prompt attention to mitigate the threat.

  • Likely attacker skill level: Expert.
  • Required access or conditions: None.
  • Business risk or urgency: High.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability allows for unauthenticated remote code execution by exploiting improper input sanitization in PlaySMS. Attackers can leverage this to compromise affected systems, potentially leading to data breaches and service disruptions. The impact can be significant if the application is exposed to the internet.

  • Find all PlaySMS assets.
  • Limit network access to PlaySMS.
  • Update PlaySMS and confirm the fix.

Frequently asked questions

What is PlaySMS and what is it used for?

PlaySMS is a web-based application used as an SMS gateway. It allows users to send and manage SMS messages, often integrated with other systems or services for automated messaging. It's typically used by businesses or organizations that need to handle SMS communication programmatically or in bulk.

What kind of vulnerability is CVE-2020-8644 in PlaySMS?

CVE-2020-8644 in PlaySMS is a CWE-94 vulnerability, often referred to as Code Injection or Improper Control of Generation of Code ('Code Injection'). This means the software doesn't properly handle user-provided data, allowing an attacker to insert and execute malicious code on the server.

How could an attacker exploit this PlaySMS vulnerability?

An attacker could exploit this by sending a specially crafted string to the PlaySMS application. The application fails to sanitize this input, which can trigger a template injection. This process can ultimately lead to the attacker executing their own code on the server without needing any prior authentication.

Who needs to be concerned about this CVE-2020-8644 threat?

Organizations running PlaySMS should be concerned, especially if it's accessible from the internet. The Halo Surface Signal indicates a 'Likely' exposure because web-based SMS gateways are often internet-facing, making them potential targets for remote attackers.

What should I do first if I'm running PlaySMS?

The first crucial step is to identify all instances of PlaySMS within your environment. Following that, consider restricting network access to the PlaySMS application if possible, and prioritize updating PlaySMS to version 1.4.3 or later, which addresses this vulnerability.

References