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CVE-2020-19861

Description

When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldns_rdf_size(salt_rdf) byte data can be copied, causing heap overflow information leakage.

POC

Reference

No PoCs from references.

Github

- https://github.com/ARPSyndicate/cvemon

- https://github.com/Live-Hack-CVE/CVE-2020-19861

- https://github.com/pokerfacett/MY_CVE_CREDIT