[lkml]   [2007]   [May]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [AppArmor 01/41] Pass struct vfsmount to the inode_create LSM hook
    On May 24, 2007, at 14:58:41, Casey Schaufler wrote:
    > On Fedora zcat, gzip and gunzip are all links to the same file. I
    > can imagine (although it is a bit of a stretch) allowing a set of
    > users access to gunzip but not gzip (or the other way around).

    That is a COMPLETE straw-man argument. I can override your "check"
    with this absolutely trivial perl code:

    exec { "/usr/bin/gunzip" } "gzip", "-9", "some/file/to.gz";

    Pathname-based checks are pretty fundamentally insecure. If you want
    to protect a "name", then you should tag the "name" with security
    attributes (IE: AppArmor). On the other hand, if you actually want
    to protect the _data_, then tagging the _name_ is flawed; tag the
    *DATA* instead.

    Kyle Moffett

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2007-05-26 07:23    [W:0.022 / U:8.452 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site