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おっとこういう話があったんだ。
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WinPcap NPF.SYS bpf_filter_init Arbitrary Array Indexing Vulnerability - iDefense
VI. VENDOR RESPONSE
The WinPcap Team has addressed this vulnerability by releasing version 4.0.2 of the WinPcap software. For more information, see the following URL.
http://www.winpcap.org/misc/changelog.htm