full-disclosure - Re: Fwd: VSFTPD Remote Heap Overrun (low severity)

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Message-ID: <4EE79BC3.8000908@redhat.com>
Date: Tue, 13 Dec 2011 13:38:59 -0500
From: Daniel J Walsh <dwalsh@...hat.com>
To: Ramon de C Valle <rcvalle@...hat.com>
Cc: "HI-TECH ." <isowarez.isowarez.isowarez@...glemail.com>,
	full-disclosure@...ts.grok.org.uk
Subject: Re: Fwd: VSFTPD Remote Heap Overrun (low severity)

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On 12/12/2011 07:37 PM, Ramon de C Valle wrote:
>>> But how can I state that ftp has access to the users homedir
>>> and not allow access to user_home_t?
>> This is a good question. Actually, we shouldn't allow ftpd_t read
>> the locale files from within user_home_t directories. But now I'm
>> not sure if this will be possible.
> A different file context for /home/(.*)/usr/share/zoneinfo(/.*) in
> vsftpd policy module would be a feasible solution? Will ftpd_t
> honour this when creating new files?
> 
If you want to prevent apps from reading zoneinfo files that a user
can write and read files a user can write, you will loose.

Why are you setting up the chroot with content a user can write too?
If you simply prevent him from writing to /usr/share, won't that solve
the problem?
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