Advisory Details

May 17th, 2023

(Pwn2Own) Synology DiskStation Manager dnsauth.php Missing Authentication Information Disclosure Vulnerability

ZDI-23-659
ZDI-CAN-19828

CVE ID
CVSS SCORE 6.5, (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
AFFECTED VENDORS Synology
AFFECTED PRODUCTS DiskStation Manager
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Synology DiskStation Manager. This vulnerability does not require authentication, but does require some user interaction.

The specific flaw exists within the dnsauth.php endpoint. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary 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-global/security/advisory/Synology_SA_22_23
DISCLOSURE TIMELINE
  • 2023-01-24 - Vulnerability reported to vendor
  • 2023-05-17 - Coordinated public release of advisory
CREDIT Claroty Research - Vera Mens, Noam Moshe, Uri Katz, Sharon Brizinov
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