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Original commit message: ares_parse_naptr_reply: check sufficient data Check that there is enough data for the required elements of an NAPTR record (2 int16, 3 bytes for string lengths) before processing a record. This patch fixes CVE-2017-1000381 The c-ares function ares_parse_naptr_reply(), which is used for parsing NAPTR responses, could be triggered to read memory outside of the given input buffer if the passed in DNS response packet was crafted in a particular way. Refs: https://c-ares.haxx.se/adv_20170620.html Refs: https://c-ares.haxx.se/CVE-2017-1000381.patch PR-URL: https://github.com/nodejs/node-private/pull/88 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Matteo Collina <matteo.collina@gmail.com>