[TCPIP] Fix IPv4 and UDP receive bounds checks#9057
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Reject malformed IPv4 header and total length combinations before reassembly uses them. Compute fragment ranges from validated payload lengths, reject invalid ranges before copying reassembled data, and validate UDP lengths before checksum calculation.
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Reject malformed IPv4 header and total length combinations before reassembly uses them.
Compute fragment ranges from validated payload lengths, reject invalid ranges before copying reassembled data, and validate UDP lengths before checksum calculation.
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