RFC 9460, "Service Binding and Parameter Specification via the DNS (SVCB and HTTPS Resource Records)", November 2023

Errata ID: 7871
Status: Rejected
Type: Technical
Publication Format(s) : TEXT, PDF, HTML
Reported By: Shulhan
Date Reported: 2024-03-25
Rejected by: Warren Kumari (Ops AD)
Date Rejected: 2024-04-16

Section D.2 says:

example.com.   SVCB   1 foo.example.com. key667="hello\210qoo"

\# 32 (
00 01                                              ; priority
03 66 6f 6f 07 65 78 61 6d 70 6c 65 03 63 6f 6d 00 ; target
02 9b                                              ; key 667
00 09                                              ; length 9
68 65 6c 6c 6f d2 71 6f 6f                         ; value
)

\x00\x01                                           # priority
\x03foo\x07example\x03com\x00                      # target
\x02\x9b                                           # key 667
\x00\x09                                           # length 9
hello\xd2qoo                                       # value

It should say:

example.com.   SVCB   1 foo.example.com. key667="hello\210qoo"

\# 32 (
00 01                                              ; priority
03 66 6f 6f 07 65 78 61 6d 70 6c 65 03 63 6f 6d 00 ; target
02 9b                                              ; key 667
00 09                                              ; length 9
68 65 6c 6c 6f 88 71 6f 6f                         ; value
)

\x00\x01                                           # priority
\x03foo\x07example\x03com\x00                      # target
\x02\x9b                                           # key 667
\x00\x09                                           # length 9
hello\x88qoo                                       # value

Notes:

Original report:
The escaped octal number "\210" when encoded to hexadecimal should be "88" or "\x88", NOT "d2" or "\xd2".

The "d2" or "\xd2" is hexadecimal value for decimal number "210".


WK Edit: I am rejecting this Errata -- the display format (key667="hello\210qoo") is encoded using the DNS RFC1035 syntax, which specifies:
\DDD where each D is a digit is the octet corresponding to
the decimal number described by DDD.

This is, um, surprising to many, and a relatively common source of issues in the DNS parsing world.

I encourage future updates of the RFC to include a "footnote" / parenthetical pointing this out...
--VERIFIER NOTES--
I am rejecting this Errata -- the display format (key667="hello\210qoo") is encoded using the DNS RFC1035 syntax, which specifies:
\DDD where each D is a digit is the octet corresponding to
the decimal number described by DDD.

This is, um, surprising to many, and a relatively common source of issues in the DNS parsing world.

I encourage future updates of the RFC to include a "footnote" / parenthetical pointing this out...

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