This is the mail archive of the
libc-hacker@cygnus.com
mailing list for the glibc project.
Re: Fwd: libc6 vulnerability
> Mail-Copies-To: never
> Cc: libc-hacker@cygnus.com
> From: Andreas Jaeger <aj@arthur.rhein-neckar.de>
> Date: 08 Feb 1999 09:04:55 +0100
> - hconf_name = getenv (ENV_HOSTCONF);
> - if (hconf_name == NULL)
> + filename = getenv (ENV_HOSTCONF);
> + if (filename != NULL && euidaccess (filename, R_OK) >= 0)
Don't do that. It would create a race condition if `filename' was
actually a symbolic link that was changed between the euidaccess() and
the open(). Instead, use secure_getenv.
--
Geoffrey Keating <geoffk@ozemail.com.au>