Signature Detail
Short Name |
SMTP:RESPONSE:USER-UNKNOWN |
|---|---|
Severity |
Info |
Recommended |
No |
Category |
SMTP |
Release Date |
2003/04/22 |
Update Number |
1213 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+ |
SMTP: Response User Unknown
This signature detects SMTP server responses that are generated when an unsuccessful attempt is made to verify an unknown e-mail address using the "VRFY" command. Attackers receive a "550 user unknown" error message.
Extended Description
None
References
- CVE: CVE-1999-0531