Re: CVE request: oping allows the disclosure of arbitrary file contents

[Julien Tinnes <jt () cr0 org>]

On Mon, Sep 28, 2009 at 2:45 PM, Steve Kemp <steve () steve org uk> wrote:
>  oping is setuid root application and one of the command line arguments allows
>  a configuration file to be specified.  This file is read and *reported*
>  to the console - Unless the file is lucky enough to look like a list
>  of hostnames.
>
>  Brief details here:
>
>        http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=548684

Hi,

in case anyone cares, oping also attempts to drop privileges with
setuid(getuid()); without checking setuid()'s return value.

It's an obvious vulnerability, because a local attacker can make
setuid() fail by setting a resource limit of 0 for RLIMIT_NPROC with
setrlimit().

Julien