Advisory Details

January 9th, 2025

SonicWALL NSv Authentication Bypass Vulnerability

CVE ID	CVE-2024-53704
CVSS SCORE	9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	SonicWALL
AFFECTED PRODUCTS	NSv
VULNERABILITY DETAILS	This vulnerability allows remote attackers to bypass authentication on affected installations of SonicWALL NSv. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of Base64-encoded session cookies. The issue results from an incorrect implementation of an authentication algorithm. An attacker can leverage this vulnerability to bypass authentication 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-2025-0003
DISCLOSURE TIMELINE	2024-11-05 - Vulnerability reported to vendor 2025-01-09 - Coordinated public release of advisory 2025-01-09 - Advisory Updated
CREDIT	Daan Keuper, Thijs Alkemade and Khaled Nassar of Computest Security

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