(Pwn2Own) Synology RT6600ax Improper Access Control Firewall Bypass Vulnerability

July 11th, 2024
ZDI-24-832 ZDI-CAN-22430

CVE ID

CVE-2024-39347

CVSS Score

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

Affected Vendors

Synology

Affected Products

RT6600ax

Vulnerability Details

This vulnerability allows remote attackers to bypass firewall rules and access the LAN interface on affected installations of Synology RT6600ax routers. Authentication is required to exploit this vulnerability.

The specific flaw exists within the handling of firewall rules. The issue results from improper access control after the initial setup. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root.

Additional Details

Synology has issued an update to correct this vulnerability. More details can be found at:
https://www.synology.com/en-id/security/advisory/Synology_SA_23_16

Disclosure Timeline

  • 2023-11-15 - Vulnerability reported to vendor
  • 2024-07-11 - Coordinated public release of advisory
  • 2024-08-15 - Advisory Updated

Credit

Tri and Bien Pham (@bienpnn) from Team Orca of Sea Security

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