CNAME chasing: fix crash if CNAME with URR syntax (!24) · Merge requests · DNS testing tools / IBDNS

Marc van der Wal requested to merge vanderwal/ibdns:bugfix/#29 into develop Jan 18, 2023

If a CNAME resource record is specified using the syntax specified in RFC 3597, the CNAME-chasing code could crash.

This commit fixes the crash. These CNAME resource records are never chased, because we cannot guarantee that the binary data inside those records encode valid domain names.

CNAME chasing: fix crash if CNAME with URR syntax

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