Vulnerabilities > CVE-2017-9554 - Information Exposure vulnerability in Synology Diskstation Manager

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
network
low complexity
synology
CWE-200
exploit available
metasploit

Summary

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.

Vulnerable Configurations

Part Description Count
Application
Synology
71

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Exploit-Db

descriptionSynology DiskStation Manager (DSM) < 6.1.3-15152 - 'forget_passwd.cgi' User Enumeration. CVE-2017-9554. Webapps exploit for CGI platform
fileexploits/cgi/webapps/43455.txt
idEDB-ID:43455
last seen2018-01-24
modified2018-01-08
platformcgi
port
published2018-01-08
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/43455/
titleSynology DiskStation Manager (DSM) < 6.1.3-15152 - 'forget_passwd.cgi' User Enumeration
typewebapps

Metasploit

descriptionThis module attempts to enumerate users on the Synology NAS by sending GET requests for the forgot password URL. The Synology NAS will respond differently if a user is present or not. These count as login attempts, and the default is 10 logins in 5min to get a permanent block. Set delay accordingly to avoid this, as default is permanent. Vulnerable DSMs are: DSM 6.1 < 6.1.3-15152 DSM 6.0 < 6.0.3-8754-4 DSM 5.2 < 5.2-5967-04
idMSF:AUXILIARY/SCANNER/HTTP/SYNOLOGY_FORGET_PASSWD_USER_ENUM
last seen2020-06-04
modified2020-05-21
published2020-05-21
references
reporterRapid7
sourcehttps://github.com/rapid7/metasploit-framework/blob/master//modules/auxiliary/scanner/http/synology_forget_passwd_user_enum.rb
titleSynology Forget Password User Enumeration Scanner

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/145740/synologydsm-enumerate.txt
idPACKETSTORM:145740
last seen2018-01-10
published2018-01-08
reporterSteve Kaun
sourcehttps://packetstormsecurity.com/files/145740/Synology-DiskStation-Manager-DSM-User-Enumeration.html
titleSynology DiskStation Manager (DSM) User Enumeration