lkml.org 
[lkml]   [2007]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [AppArmor 39/45] AppArmor: Profile loading and manipulation, pathname matching
    James Morris wrote:
    > On Thu, 21 Jun 2007, Chris Mason wrote:
    >>> The incomplete mediation flows from the design, since the pathname-based
    >>> mediation doesn't generalize to cover all objects unlike label- or
    >>> attribute-based mediation. And the "use the natural abstraction for
    >>> each object type" approach likewise doesn't yield any general model or
    >>> anything that you can analyze systematically for data flow.
    >>>
    >> This feels quite a lot like a repeat of the discussion at the kernel
    >> summit. There are valid uses for path based security, and if they don't
    >> fit your needs, please don't use them. But, path based semantics alone
    >> are not a valid reason to shut out AA.
    >>
    > The validity or otherwise of pathname access control is not being
    > discussed here.
    >
    > The point is that the pathname model does not generalize, and that
    > AppArmor's inability to provide adequate coverage of the system is a
    > design issue arising from this.
    >
    The above two paragraphs appear to contradict each other.

    > Recall that the question asked by Lars was whether there were any
    > outstanding technical issues relating to AppArmor.
    >
    > AppArmor does not and can not provide the level of confinement claimed by
    > the documentation, and its policy does not reflect its actual confinement
    > properties. That's kind of a technical issue, right?
    >
    So if the document said "confinement with respect to direct file access
    and POSIX.1e capabilities" and that list got extended as AA got new
    confinement features, would that address your issue?

    Crispin

    --
    Crispin Cowan, Ph.D. http://crispincowan.com/~crispin/
    Director of Software Engineering http://novell.com
    AppArmor Chat: irc.oftc.net/#apparmor


    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-06-22 08:03    [W:0.021 / U:0.428 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site