Advisory Details

April 24th, 2025

SonicWALL Connect Tunnel Link Following Denial-of-Service Vulnerability

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
  • 2025-04-24 - Advisory Updated
CREDIT CrisprXiang With FDU and Hao Huang with FDU
BACK TO ADVISORIES