lkml.org 
[lkml]   [2012]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: [PATCH v3] fs: introduce pipe-only dump mode suid_dumpable=3
    From
    On Fri, Jun 22, 2012 at 12:55 PM, Andrew Morton
    <akpm@linux-foundation.org> wrote:
    > On Fri, 22 Jun 2012 12:24:13 -0700
    > Kees Cook <keescook@chromium.org> wrote:
    >
    >> The value
    >> of suid_dumpable=2 is now historic, and attempting to set this sysctl
    >> value returns -EINVAL.
    >
    > This sounds a bit harsh - will it not cause existing configurations to
    > immediately break?  If so, would it not be better to retain the =2 mode
    > for a while, and emit a nice warning when it is set?

    I view it as a security vulnerability, so I'd rather see it
    eliminated. I see "=1" as a security vulnerability too, but at least
    that's well-known to be a bad idea. The "=2" mode has been assumed to
    be safe, but it isn't.

    -Kees

    --
    Kees Cook
    Chrome OS Security
    --
    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: 2012-06-22 23:41    [W:0.026 / U:0.700 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site