Re: [Full-disclosure] Fwd: VSFTPD Remote Heap Overrun (low severity)

[Daniel J Walsh <dwalsh@xxxxxxxxxx>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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?
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iEYEARECAAYFAk7nm8MACgkQrlYvE4MpobPNTQCfVp6Dqqq/1M6IID8bmQ+WckxA
ocQAoMluitPtotAwImWn2dKLguz4u5VF
=vX9u
-----END PGP SIGNATURE-----

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/