OSV-2023-1168 Heap-buffer-overflow in pcpp::PPP_PPTPLayer::computeCalculateFields

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=64196 Crash type: Heap-buffer-overflow WRITE 2 Crash state: pcpp::PPPPPTPLayer::computeCalculateFields pcpp::Packet::computeCalculateFields FuzzTarget.cpp...