lkml.org 
[lkml]   [1999]   [Apr]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] Capabilities, this time in elf section
    Least astonishment in this case would mean that the binary has the
    capabilities available to its EUID. In the case of a SUID binary
    the EUID is the UID of the owner of the binary.

    This is the reason for SUID binaries.

    Non-SUID binaries get their EUID from the UID of the user
    running the binary. So they can only have capabilities that
    are available to that user.

    If a binary requires a capability to run to do its job
    then it either needs to be run by a user that has that
    capability or it needs to be SUID to a user that does.

    SUID binaries should _still_ be rare, but since they
    will not all be SUID-root the potential security
    risk will be reduced.

    Daniel Taylor

    On Fri, 9 Apr 1999, Jonathan Walther wrote:

    >
    > On Fri, 9 Apr 1999, Daniel Taylor wrote:
    > > Exactly.
    > > Non-SUID binary, & capabilities with user,
    > > SUID binary, own capabilities.
    >
    > I disagree. if you suid to some other user, then they become the effective
    > user, so the effective capabilities should become and & of THAT users
    > capabilities and the binaries capabilities, and not those of the invoker.
    >
    > Doesn't anyone believe in the principle of least astonishment? :-(
    >
    > Jonathan Walther
    > Digital Video Broadcasting Systems
    > http://216.100.231.12 (requires netscape)
    >


    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:51    [W:0.020 / U:93.432 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site