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Free DHCP options with length zero.

Description

Free DHCP options with length zero.

Otherwise they are leaked, allowing an attacker to trigger memory
exhaustion.

This is options.c rev. 1.70 from OpenBSD.

admbugs: 552
Obtained from: OpenBSD
MFC after: 3 days

Details

Provenance
markjAuthored on Jun 26 2019, 8:19 PM
Parents
rGa3ae40c7a468: Avoid a divide-by-zero when bad checksum counters overflow.
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