Samba 4.6.8 已发布，这是一个安全版本，主要解决以下问题：
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CVE-2017-12150 (SMB1/2/3 connections may not require signing where they should)
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CVE-2017-12151 (SMB3 connections don't keep encryption across DFS redirects)
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CVE-2017-12163 (Server memory information leak over SMB1)
详情
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CVE-2017-12150: A man in the middle attack may hijack client connections.
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CVE-2017-12151: A man in the middle attack can read and may alter confidential documents transferred via a client connection, which are reached via DFS redirect when the original connection used SMB3.
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CVE-2017-12163: Client with write access to a share can cause server memory contents to be written into a file or printer.
有关详细信息和解决方法，请参阅安全性建议：
https://www.samba.org/samba/security/CVE-2017-12150.html
https://www.samba.org/samba/security/CVE-2017-12151.html
https://www.samba.org/samba/security/CVE-2017-12163.html
Changes since 4.6.7:Jeremy Allison <jra@samba.org>
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BUG 12836: s3: smbd: Fix a read after free if a chained SMB1 call goes async.
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BUG 13020: CVE-2017-12163: s3:smbd: Prevent client short SMB1 write from writing server memory to file.
Ralph Boehme <slow@samba.org>
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BUG 12885: s3/smbd: Let non_widelink_open() chdir() to directories directly.
Stefan Metzmacher <metze@samba.org>
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BUG 12996: CVE-2017-12151: Keep required encryption across SMB3 dfs redirects.
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BUG 12997: CVE-2017-12150: Some code path don't enforce smb signing when they should.
