Title: Ipswitch IMail Account Information Brute Force Vulnerability
Severity: HIGH
Description:
Ipswitch IMail is an email server that serves clients their mail via a web interface. IMail supports most common email protocols such as SMTP, POP3, IMAP4, and LDAP, etc.
An issue exists in Ipswitch IMail server, which could allow an unauthorized user to gain knowledge of a legitimate username and brute force the password.
If a remote client supplies an invalid username, a specific message will be returned to the user (OK send your password). A different message is generated if the username is valid (OK welcome). These contrasting messages will permit an attacker to easily determine valid usernames, making more 'intelligent' brute force attacks possible.
Successful exploitation of this vulnerability could enable an attacker to obtain valid usernames.
Affected Products:
- Ipswitch IMail 6.0.2
- Ipswitch IMail 6.0.6
- Ipswitch IMail 7.0.4
References:
- IPSwitch: IMail Server Support Center
- Ipswitch: IMail Server Home Page
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