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    SubjectRe: Core dumps and being root
    Date
    > 
    > Someone pointed this out on irc and much to my suprise its true.
    >
    > With 2.1.10x programs run as root by root with uid==gid euid==egid
    > are not dumpable. So you can't core dump programs as root. This
    > seems to be because
    >
    > if (current->euid != current->uid || current->egid != current->gid ||
    > !cap_isclear(current->cap_permitted))
    > current->dumpable = 0;
    >
    > doesn't account for the superuser - who has special rights but shouldnt
    > be stopped from core dumping as those rights are (in normal unix anyway)
    > not 'raised' but implicit.
    >
    > Alan

    Doesn't this open a huge security hole? Right now, a user can do the
    following:

    ln -s some_other_file core
    ./command_that_dumps_core

    and get a core dump in some_other_file.

    Now, suppose root can dump core. Then if there is a link from core to, say,
    /etc/passwd, strategically located, and root dumps core in that directory...

    I don't think there is a problem if root core dumps were always placed in
    /root/core, or some other "safe" location. But not the current directory.


    dave...



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