Null Pointer Dereference in SonicOS SSLVPN Affects SonicWall Products

CVE-2025-32818

What is CVE-2025-32818?

CVE-2025-32818 is a vulnerability affecting SonicWall products, specifically within the SonicOS SSLVPN Virtual office interface. This vulnerability allows a remote, unauthenticated attacker to trigger a Null Pointer Dereference, which can crash the firewall and result in a Denial-of-Service (DoS) condition. As many organizations rely on SonicWall for secure remote access and network protection, this vulnerability poses a significant threat, potentially disrupting business operations and impacting network security.

Technical Details

The vulnerability manifests within the SSLVPN component of SonicOS, which is used to facilitate secure virtual private network connections. When exploited, the Null Pointer Dereference can lead to unexpected behavior within the firewall, prompting it to become unresponsive. This condition occurs without the need for user authentication, thus allowing attackers to exploit the vulnerability remotely.

Potential Impact of CVE-2025-32818

1. Denial-of-Service (DoS): The primary impact of this vulnerability is the potential for a Denial-of-Service attack, where the affected firewall becomes incapacitated, disrupting connectivity for users and services relying on the secure VPN.

2. Operational Disruption: As the firewall may crash, organizations could experience significant operational disruptions. This can lead to downtime, impacting productivity, and could have cascading effects on business processes.

3. Increased Attack Surface: The presence of this vulnerability may encourage more aggressive attacks from threat actors targeting the organization, as the existence of the exploit could be used as a stepping stone for further nefarious activities.

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