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[Bug network/12154] Cannot resolve hosts which have aliases which follow not host name syntax
- From: "fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Sat, 09 Jan 2016 09:04:06 +0000
- Subject: [Bug network/12154] Cannot resolve hosts which have aliases which follow not host name syntax
- Auto-submitted: auto-generated
- References: <bug-12154-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=12154
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fweimer at redhat dot com
Summary|Can not resolve chained |Cannot resolve hosts which
|CNAME with a wildcard among |have aliases which follow
|the chained CNAME |not host name syntax
--- Comment #4 from Florian Weimer <fweimer at redhat dot com> ---
RFC 1034 is ambiguous whether this allowed or not. These are simply
syntactically invalid labels. Wildcards are transmitted over the wire because
they are a zone file concept. They are not expanded on the RHS of a CNAME
record, which is why you see the â*â label here.
I'm not sure if it is a good idea to remove the restriction entirely because
aliases could now contain shell metacharacters. We could drop them from the
return response and no longer fail the query, though.
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