Re: Stacking Openwall and SELinux?

From: Stephen Smalley (sdsat_private)
Date: Mon Apr 01 2002 - 13:29:04 PST

  • Next message: Seth Arnold: "Re: Stacking Openwall and SELinux?"

    On Mon, 1 Apr 2002, David Wheeler wrote:
    
    > I believe that several functions in Openwall don't
    > require any additional information in the kernel data structures.
    > Would it be possible to split out those capabilities into
    > a "partial openwall" module that implements those features?
    > I'm thinking about things like the Non-executable stack,
    > temp directory limitations, etc.  That way, those functions could
    > be added to any system using insmod.
    
    Probably, although that would be up to the OWLSM module maintainers (not
    me).  However, if you want SELinux+capabilities+OWLSM, you will also need
    to make some other changes.  At present, I think that OWLSM has directly
    copied logic from the dummy module into its hook functions, so it is
    hardwired to provide OWLSM+superuser logic.  This logic should be removed
    and replaced with the same kind of minimal stacking support provided by
    SELinux to permit stacking OWLSM with either the dummy or capabilities
    modules.  Then, we would also need to revise SELinux to permit stacking
    multiple secondary modules so that you could stack both OWLSM and
    capabilities.
    
    --
    Stephen D. Smalley, NAI Labs
    ssmalleyat_private
    
    
    
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