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.

References

CVE: CVE-1999-0531

Short Name
SMTP:RESPONSE:USER-UNKNOWN
Severity
Info
Recommended
False
Recommended Action
None
Category
SMTP
Keywords
CVE-1999-0531 Response Unknown User
Release Date
04/22/2003
Supported Platforms

srx-branch-12.3

srx-19.3

srx-branch-19.3

vsrx3bsd-19.2

srx-branch-19.4

vsrx-19.4

mx-12.3

mx-19.4

vmx-19.4

mx-19.3

vsrx3bsd-19.4

srx-19.4

vsrx-12.3

vmx-19.3

vsrx-19.2

srx-12.3

Sigpack Version
3375
False Positive
Rarely

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