SonicWALL Connect Tunnel Link Following Denial-of-Service Vulnerability

April 24th, 2025
ZDI-25-253 ZDI-CAN-25726

CVE ID

CVE-2025-32817

CVSS Score

6.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Affected Vendors

SonicWALL

Affected Products

Connect Tunnel

Vulnerability Details

This vulnerability allows local attackers to create a denial-of-service condition on affected installations of SonicWALL Connect Tunnel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the SonicWall VPN service. By creating a symbolic link, an attacker can abuse the service to create a file. An attacker can leverage this vulnerability to create a persistent denial-of-service condition on the system.

Additional Details

SonicWALL has issued an update to correct this vulnerability. More details can be found at:
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0007

Disclosure Timeline

  • 2025-02-13 - Vulnerability reported to vendor
  • 2025-04-24 - Coordinated public release of advisory
  • 2025-05-21 - Advisory Updated

Credit

Anonymous

Back to Advisories