When a zone file in ldns 1.7.1 is parsed, the function ldnsnsec3saltdata is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldnsrdfsize(saltrdf) byte data can be copied, causing heap overflow information leakage.

When ldns version 1.7.1 verifies a zone file, the ldnsrrnewfrmstrinternal function has a heap out of bounds read vulnerability. An attacker can leak information on the heap by constructing a zone file payload.