3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
99 lines
3.5 KiB
Text
99 lines
3.5 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
|
|
|
|
=============================================================================
|
|
FreeBSD-SA-00:29 Security Advisory
|
|
FreeBSD, Inc.
|
|
|
|
Topic: wu-ftpd port contains remote root compromise [REVISED]
|
|
|
|
Category: ports
|
|
Module: wu-ftpd
|
|
Announced: 2000-07-05
|
|
Revised: 2000-07-11
|
|
Credits: tf8 <tf8@ZOLO.FREELSD.NET>
|
|
Affects: Ports collection.
|
|
Corrected: 2000-06-24
|
|
Vendor status: Contacted
|
|
FreeBSD only: NO
|
|
|
|
I. Background
|
|
|
|
wu-ftpd is a popular FTP server.
|
|
|
|
II. Problem Description
|
|
|
|
The wu-ftpd port, versions 2.6.0 and below, contains a vulnerability
|
|
which allows FTP users, both anonymous FTP users and those with a
|
|
valid account, to execute arbitrary code as root on the local machine,
|
|
by inserting string-formatting operators into command input, which are
|
|
incorrectly parsed by the FTP server.
|
|
|
|
The wu-ftpd port is not installed by default, nor is it "part of
|
|
FreeBSD" as such: it is part of the FreeBSD ports collection, which
|
|
contains over 3500 third-party applications in a ready-to-install
|
|
format. The ports collections shipped with FreeBSD 3.5 and 4.0
|
|
contains this problem since it was discovered after the release.
|
|
|
|
FreeBSD makes no claim about the security of these third-party
|
|
applications, although an effort is underway to provide a security
|
|
audit of the most security-critical ports.
|
|
|
|
III. Impact
|
|
|
|
FTP users, including anonymous FTP users, can cause arbitrary commands
|
|
to be executed as root on the local machine.
|
|
|
|
If you have not chosen to install the wu-ftpd port/package, then your
|
|
system is not vulnerable to this problem.
|
|
|
|
IV. Workaround
|
|
|
|
Deinstall the wu-ftpd port/package, if you you have installed it.
|
|
|
|
V. Solution
|
|
|
|
One of the following:
|
|
|
|
1) Upgrade your entire ports collection and rebuild the wu-ftpd port.
|
|
|
|
2) Deinstall the old package and install a new package dated after the
|
|
correction date, obtained from:
|
|
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/ftp/wu-ftpd-2.6.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/ftp/wu-ftpd-2.6.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/ftp/wu-ftpd-2.6.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/ftp/wu-ftpd-2.6.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/ftp/wu-ftpd-2.6.0.tgz
|
|
|
|
NOTE: It may be several days before updated packages are available. Be
|
|
sure to check the file creation date on the package, because the
|
|
version number of the software has not changed.
|
|
|
|
3) download a new port skeleton for the wu-ftpd port from:
|
|
|
|
http://www.freebsd.org/ports/
|
|
|
|
and use it to rebuild the port.
|
|
|
|
4) Use the portcheckout utility to automate option (3) above. The
|
|
portcheckout port is available in /usr/ports/devel/portcheckout or the
|
|
package can be obtained from:
|
|
|
|
ftp://ftp.freebsd.org/pub/FreeBSD/ports/packages/devel/portcheckout-1.0.tgz
|
|
|
|
VI. Revision History
|
|
|
|
v1.0 2000-07-05 Initial release
|
|
v1.1 2000-07-11 Clarify that vulnerability affects all FTP users, not
|
|
just anonymous FTP. Correct URL of package. Update
|
|
size of ports collection.
|
|
|
|
-----BEGIN PGP SIGNATURE-----
|
|
Version: 2.6.2
|
|
|
|
iQCVAwUBOWuZzVUuHi5z0oilAQH+bgQAhpYzJ0xiU787xQFr/YnOJHe0k/CJiDOU
|
|
yrfyvGq4Grl4F/czojsyRTd5DwQzBKqIYm1H/z73gxI6nbEe0KaP+omfpzaAy7iK
|
|
pLyQJ5qbjQLuc54ed+gV1+lH84QkuMHzUygj5iqvjn91uAA5nMKEMnGbESZz3J4J
|
|
NjYmA1EfXbI=
|
|
=T7IG
|
|
-----END PGP SIGNATURE-----
|