Re: [netmod] Secdir last call review of draft-ietf-netmod-syslog-model-21

"Gary Wu (garywu)" <garywu@cisco.com> Wed, 21 February 2018 20:37 UTC

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From: "Gary Wu (garywu)" <garywu@cisco.com>
To: Yaron Sheffer <yaronf.ietf@gmail.com>, "Clyde Wildes (cwildes)" <cwildes@cisco.com>
CC: "draft-ietf-netmod-syslog-model.all@ietf.org" <draft-ietf-netmod-syslog-model.all@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] Secdir last call review of draft-ietf-netmod-syslog-model-21
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Date: Wed, 21 Feb 2018 20:36:59 +0000
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Subject: Re: [netmod] Secdir last call review of draft-ietf-netmod-syslog-model-21
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    >      Security Comments
    >      
    >      * I think almost all writable data nodes here are sensitive, because a network
    >      attacker's first move is to block any logging on the host, and many of the data
    >      nodes here can be used for this purpose.
    > 
    > [clw1] I will reword the security section to include all writeable nodes as sensitive.
    > 
    >      * Re: readable data nodes, I'm not
    >      sure which are sensitive, and the document should give an example or two rather
    >      than just say "some". Otherwise the security advice is not actionable. One
    >      example: "remote" sections leak information about other hosts in the network.
    > 
    > [clw1] This text was lifted from another model. I will review the readable nodes and update.
    > 
    >      * Write operations... can have a negative effect on network operations. - I would
    >      add "and on network security", because logs are often used to detect security
    >      breaches.
    > 
    > [clw1] I will add this phrase.
    > 

The fact that the syslog data nodes are write-sensitive can be made explicit in
the model by making the whole configuration tree nacm:default-deny-write, and
making read-sensitive subtrees nacm:default-deny-all.

Thanks,
Gary Wu