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Cisco Bug: CSCzv55504 - CRLF sequence split across packets or TLS records is handled incorrectly

Last Modified

Mar 07, 2018

Products (1)

  • Cisco Email Security Appliance

Known Affected Releases

6.3.6-003 6.5.1-005 7.0.0-000 7.6.1-022 8.0.1-023 8.5.6-074

Description (partial)

This defect may result in messages passing through the Cisco ESA becoming corrupted.  Specifically, there will be an extra blank line present at the very beginning of the message, before the headers.

This issue occurs when the CR and LF characters for the 'DATA' SMTP command are split between two separate packets or TLS records.
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