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RFC 5961, "Improving TCP's Robustness to Blind In-Window Attacks", August 2010

Source of RFC: tcpm (tsv)
See Also: RFC 5961 w/ inline errata

Errata ID: 4845
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Michael Tüxen
Date Reported: 2016-10-27
Verifier Name: Mirja Kühlewind
Date Verified: 2016-10-31

Section 3.2 says:

   1) If the RST bit is set and the sequence number is outside the
      current receive window (SEG.SEQ <= RCV.NXT || SEG.SEQ > RCV.NXT+
      RCV.WND), silently drop the segment.

It should say:

   1) If the RST bit is set and the sequence number is outside the
      current receive window (SEG.SEQ < RCV.NXT || SEG.SEQ >= RCV.NXT+
      RCV.WND), silently drop the segment.

Notes:

The condition should be the opposite of (RCV.NXT <= SEG.SEQ < RCV.NXT+RCV.WND), which is stated in the second item of the enumeration.

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