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CVE-2017-12986/IPv6 R.H.: Update to reflect the actual IPv6 RFC.
In RFC 1883, the Type 0 routing header had a 1-byte reserved field and a 3-byte strict/loose bit map; in RFC 2460, that changed to a 4-byte reserved field. This fixes a buffer over-read discovered by Brian 'geeknik' Carpenter (by making an ND_TCHECK() call check for the presence in the captured data of all 4 bytes of the reserved field; we were printing it as a 4-byte field, so we needed to check for them). Add a test using the capture file supplied by the reporter(s).
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| Original file line number | Diff line number | Diff line change |
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| IP6 3030:3030:3030:3030:3030:3030:3030:3030 > 3030:3030:3030:3030:3030:3030:3030:3030: srcrt (len=48, type=0, segleft=48[|srcrt] |
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