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    SubjectRe: [AppArmor 39/45] AppArmor: Profile loading and manipulation, pathname matching
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    On Thu, 2007-06-21 at 23:17 +0200, Lars Marowsky-Bree wrote:
    > On 2007-06-21T16:59:54, Stephen Smalley <sds@tycho.nsa.gov> wrote:
    >
    > > Or can access the data under a different path to which their profile
    > > does give them access, whether in its final destination or in some
    > > temporary file processed along the way.
    >
    > Well, yes. That is intentional.
    >
    > Your point is?

    It may very well be unintentional access, especially when taking into
    account wildcards in profiles and user-writable directories.

    > > The emphasis on never modifying applications for security in AA likewise
    > > has an adverse impact here, as you will ultimately have to deal with
    > > application mediation of access to their own objects and operations not
    > > directly visible to the kernel (as we have already done in SELinux for
    > > D-BUS and others and are doing for X). Otherwise, your "protection" of
    > > desktop applications is easily subverted.
    >
    > That is an interesting argument, but not what we're discussing here.
    > We're arguing filesystem access mediation.

    IOW, anything that AA cannot protect against is "out of scope". An easy
    escape from any criticism.

    > > Um, no. It might not be able to directly open files via that path, but
    > > showing that it can never read or write your mail is a rather different
    > > matter.
    >
    > Yes. Your use case is different than mine.

    My use case is being able to protect data reliably. Yours?

    --
    Stephen Smalley
    National Security Agency

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