OSV-2020-1687 Bad-cast to pcpp::Layer from invalid vptr

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25340 Crash type: Bad-cast Crash state: Bad-cast to pcpp::Layer from invalid vptr pcpp::IDnsResource::getRawData pcpp::DnsResource::getDataLength...

pcapplusplus:FuzzTarget: Heap-buffer-overflow in pcpp::DnsResource::getDataLength

Project: https://github.com/seladb/PcapPlusPlus.git Detailed Report: https://oss-fuzz.com/testcase?key=5752969003008000 Project: pcapplusplus Fuzzing Engine: libFuzzer Fuzz Target: FuzzTarget Job Type: libfuzzerasanpcapplusplus Platform Id: linux Crash Type: Heap-buffer-overflow READ 2 Crash...