(Pwn2Own) Synology DiskStation Manager Serv.php Authentication Bypass Vulnerability

2023-05-1700:00:00

Claroty Research - Vera Mens, Noam Moshe, Uri Katz, Sharon Brizinov

www.zerodayinitiative.com

vulnerability

remote attackers

authentication bypass

synology diskstation manager

serv.php

arbitrary code

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

4.4 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:P/A:P

0.001 Low

EPSS

Percentile

48.9%

JSON

This vulnerability allows remote attackers to bypass authentication 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 Serv.php endpoint. The issue results from incorrect implementation of the authentication mechanism. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root.