Re: capwrap: granting capabilities without fs support

[Stephen Smalley]

On Thu, 2004-04-08 at 10:07, Andy Lutomirski wrote:
> When I have time (hopefully real soon now), I'll post a patch to actually fix 
> capabilities.  With that patch, this can be a trivial wrapper script instead of 
> a kernel module.  Note that this could be _very_ dangerous if glibc does the 
> wrong thing (I don't know whether it does, though).

The security_bprm_secureexec hook can be used to cause the AT_SECURE
flag to be set in the ELF auxiliary table, and glibc now uses that flag
to determine whether to enable secure mode.  You would need to patch
cap_bprm_secureexec to do the right thing, but otherwise the support is
ready.  SELinux uses this to enable glibc secure mode for role/domain
changes.

-- 
Stephen Smalley <sds@xxxxxxxxxxxxxx>
National Security Agency

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