External risk intelligence

SonicWall SRA SQL Injection Vulnerability

CVE advisoryKnown Exploit

CVE-2021-20028

SQL injection vulnerabilities affect end-of-life SonicWall Secure Remote Access products, potentially allowing unauthorized data access and system compromise. Affected organizations face business risk due to the exposure of sensitive data and systems.

5Halo Surface Signal

SQL Injection

Sonicwall Sma 210 Firmware

8.0.0.0 to before 9.0.0.10-28sv

External exposure likelihood

Halo Surface Signal score for CVE-2021-20028

The vulnerable products are Secure Remote Access (SRA) appliances, which are designed to be deployed as internet-facing gateways to facilitate remote connectivity. By definition and common deployment, these appliances reside at the network edge to provide remote access services, making them inherently public-facing and exposed to the internet.

Horizon Alert

Summary of the vulnerability and why it matters

SQL injection vulnerabilities have been identified in end-of-life SonicWall Secure Remote Access (SRA) products. This flaw allows for unauthorized manipulation of data. The potential impact on affected organizations includes data compromise and unauthorized access to systems.

  • Vulnerable SonicWall SRA products
  • Improper SQL command handling
  • Data compromise and system access

Attack Path

How an attacker could exploit the issue

This vulnerability impacts end-of-life SonicWall Secure Remote Access (SRA) appliances. Attackers can exploit this by sending specially crafted SQL commands to the appliance. Successful exploitation allows attackers to execute arbitrary SQL commands, potentially leading to unauthorized access, data modification, or system compromise. The organization's sensitive data and systems are at risk if these appliances remain exposed.

  • Network exposure of SRA appliances.
  • Attacker sends malicious SQL commands.
  • Attacker gains unauthorized control.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability impacts end-of-life Secure Remote Access products, specifically certain firmware versions of SRA appliances. Attackers can exploit this by sending specially crafted SQL commands, potentially leading to unauthorized access and modification of sensitive data. Given the product's end-of-life status, organizations using these appliances face significant business risk.

  • Attacker skill level: Low
  • Required access or conditions: Network access
  • Business risk or urgency: High, product end-of-life

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

The identified vulnerability affects SonicWall Secure Remote Access (SRA) products, specifically impacting their ability to neutralize SQL commands, which could lead to SQL injection. This vulnerability poses a critical risk due to its network-accessible nature and the potential for attackers to achieve high levels of access and control. Affected SRA appliances running 8.x firmware and specific versions of 9.0.0 firmware are at risk.

  • Identify all SRA appliances and their firmware versions.
  • Disconnect exposed SRA appliances if still in use.
  • Apply vendor updates and validate fix implementation.
  • Monitor for related security events and system anomalies.

Frequently asked questions

What are SonicWall SRA appliances used for?

SonicWall Secure Remote Access (SRA) appliances provide a way for users to connect to an organization's network remotely. They act as a secure gateway, allowing employees or authorized individuals to access internal resources and data from outside the main office network.

What type of vulnerability is CVE-2021-20028?

CVE-2021-20028 is a SQL injection vulnerability. This means an attacker can trick the software into executing unintended SQL commands, which could allow them to view, modify, or delete data within the database.

How can an attacker exploit this SonicWall vulnerability?

An attacker could exploit this by sending specially crafted SQL commands through the network to the vulnerable SRA appliance. No special access or conditions are needed beyond network access, and the vulnerability is triggered when the appliance improperly handles these commands.

Who should be concerned about this CVE?

Organizations using SonicWall Secure Remote Access (SRA) appliances, especially those that are internet-facing, should be concerned. These appliances are often at the network edge, making them accessible from the internet and a potential target for external attackers.

What is the first step for managing this risk?

The primary recommendation for affected SonicWall SRA appliances is to disconnect them if they are still in use, as they are considered end-of-life. This action immediately removes the exposure to potential attacks.

References