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idn: return error if the conversion ends up with a blank host #10617

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@bagder bagder commented Feb 27, 2023

Some IDN sequences are converted into "" (nothing), which can make this function end up with a zero length host name and we cannot consider that a valid host to continue with.

Reported-by: Maciej Domanski

Some IDN sequences are converted into "" (nothing), which can make this
function end up with a zero length host name and we cannot consider that
a valid host to continue with.

Reported-by: Maciej Domanski
@bagder bagder added the name lookup DNS and related tech label Feb 27, 2023
@bagder bagder closed this in cf3e6ce Feb 27, 2023
@bagder bagder deleted the bagder/idn-zero-length branch February 27, 2023 14:12
bch pushed a commit to bch/curl that referenced this pull request Jul 19, 2023
Some IDN sequences are converted into "" (nothing), which can make this
function end up with a zero length host name and we cannot consider that
a valid host to continue with.

Reported-by: Maciej Domanski
Closes curl#10617
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