Full Disclosure mailing list archives
Re: DoS in PureFTPd
From: Jedi/Sector One <j () pureftpd org>
Date: Mon, 10 Nov 2003 18:21:42 +0059
On Mon, Nov 10, 2003 at 04:35:06PM +0100, Adam Zabrocki wrote:
Vulnerability function is displayrate(). There is simple overflow bug (DoS):
Killing one's own session is not a DoS. const size_t sizeof_resolved_path = MAXPATHLEN + 1U; resolved_path[sizeof_resolved_path - 1U] = 0;
if (realpath(name, resolved_path) == NULL) { ... if (resolved_path[sizeof_resolved_path - 1U] != 0) {
This realpath() doesn't fill more than MAXPATHLEN, including the zero, we even have an extra byte here. The code you are talking about is not supposed to be ever reached.
Function realpath() is write by autor PureFTP.
No. /* * Copyright (c) 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry. * Zok. -- __ /*- Frank DENIS (Jedi/Sector One) <j () 42-Networks Com> -*\ __ \ '/ <a href="http://www.PureFTPd.Org/"> Secure FTP Server </a> \' / \/ <a href="http://www.Jedi.Claranet.Fr/"> Misc. free software </a> \/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- DoS in PureFTPd Adam Zabrocki (Nov 10)
- Re: DoS in PureFTPd Jedi/Sector One (Nov 10)
- Re: DoS in PureFTPd Jedi/Sector One (Nov 10)