[Bug 230182] [MAINTAINER] dns/nsd upgrade to version 4.1.23

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230182

            Bug ID: 230182
           Summary: [MAINTAINER] dns/nsd upgrade to version 4.1.23
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs at FreeBSD.org
          Reporter: jaap at NLnetLabs.nl
 Attachment #195626 maintainer-approval+
             Flags:

Created attachment 195626
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=195626&action=edit
patch to upgrade

NSD versions 4.1.22 and before are vulnerable in comparing TSIG
information and this can be used to discover a TSIG secret.

NSD uses TSIG to protect zone transfers.  The TSIG code uses a secret
key to protect the data.  The secret key is shared with both sides of
the zone transfer connection.  The comparison code in NSD was not time
insensitive, causing the potential for an attacker to use timing
information to discover data about the key contents.

NSD versions from 2.2.0 to 4.1.22 are vulnerable.  Upgrade to 4.1.23 or
newer to get the fix.

There is no known exploit.

It was reported by Ondrej Sury (ISC).

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