Synology DiskStation Manager (DSM) < 6.1.3-15152 - 'forget_passwd.cgi' User Enumeration

vendor:

DiskStation Manager (DSM)

by:

Steve Kaun

5.3

CVSS

MEDIUM

User Enumeration

200

CWE

Product Name: DiskStation Manager (DSM)

Affected Version From: Before 6.1.3-15152

Affected Version To: 6.1.3-15152

Patch Exists: YES

Related CWE: CVE-2017-9554

CPE: a:synology:diskstation_manager

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: None

2018

Synology DiskStation Manager (DSM) < 6.1.3-15152 - 'forget_passwd.cgi' User Enumeration

An information exposure vulnerability in forget_passwd.cgi in Synology DiskStation Manager (DSM) before 6.1.3-15152 allows remote attackers to enumerate valid usernames via unspecified vectors. This can be done by sending a request to the forget_passwd.cgi page with a username as a parameter.

Mitigation:

Upgrade to the latest version of Synology DiskStation Manager (DSM) 6.1.3-15152 or later.

Source

Exploit-DB raw data:

# Exploit Title: Synology DiskStation Manager (DSM) < 6.1.3-15152 - 'forget_passwd.cgi' User Enumeration 
# Date: 01/05/2018
# Exploit Author: Steve Kaun
# Vendor Homepage: https://www.synology.com
# Version: Before 6.1.3-15152
# CVE : CVE-2017-9554

Previously this was identified by the developer and the disclosure states "via unspecified vectors" it is possible to enumerate usernames via forget_passwd.cgi

Haven't identified any other disclosures that actually identified the attack vector, figure it would be helpful to another.


"An information exposure vulnerability in forget_passwd.cgi in Synology DiskStation Manager (DSM) before 6.1.3-15152 allows remote attackers to enumerate valid usernames via unspecified vectors."

Well then... Here you go, cracked the code and figured it out.

https://IP_Address:5001/webman/forget_passwd.cgi?user=XXX

Where XXX should be your injection point for username lists.

Several usernames I've found are admin, administrator, root, nobody, ftp, and more. I'm unsure of whether Synology is pulling these entries from it's passwd file or not, but there you go.