SMTP: Attachment Filename Overflow

This protocol anomaly detects an SMTP content-disposition filename that exceeds the user-defined maximum. The default number of bytes in a content-disposition filename is 128; you can change this setting in the Sensor Settings Rulebase>Protocol Thresholds and Configuration>SMTP>Maximum length of the value for content-disposition's filename attribute.

Extended Description

The default size of a Content-Disposition file name is 128 bytes. An SMTP Content-Disposition file name that exceeds the user-defined maximum length is a protocol anomaly and should be detected.

References

URL: http://www.faqs.org/rfcs/rfc2821.html http://www.faqs.org/rfcs/rfc1521.html

Short Name

SMTP:OVERFLOW:FILENAME

Severity

Major

Recommended

False

Recommended Action

None

SMTP: Attachment Filename Overflow

Extended Description

References

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