Bugtraq mailing list archives
FreeBSD Ports Security Advisory: FreeBSD-SA-00:29.wu-ftpd [REVISED]
From: security-advisories () FREEBSD ORG (FreeBSD Security Advisories)
Date: Tue, 11 Jul 2000 15:05:26 -0700
-----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-----
Current thread:
- Microsoft Security Bulletin (MS00-048) Microsoft Product Security (Jul 07)
- Re: Microsoft Security Bulletin (MS00-048) Jenik (Jul 08)
- LPRng lpd should not be SETUID root Patrick Powell (Jul 09)
- NetBSD Security Advisory 2000-009 security-officer () NETBSD ORG (Jul 10)
- Re: LPRng lpd should not be SETUID root Cy Schubert - ITSD Open Systems Group (Jul 10)
- NetBSD Security Advisory 2000-010 security-officer () NETBSD ORG (Jul 10)
- <Possible follow-ups>
- Re: Microsoft Security Bulletin (MS00-048) Richard Waymire (Jul 10)
- Re: Microsoft Security Bulletin (MS00-048) Mikael Olsson (Jul 11)
- FreeBSD Ports Security Advisory: FreeBSD-SA-00:29.wu-ftpd [REVISED] FreeBSD Security Advisories (Jul 11)
- Re: Microsoft Security Bulletin (MS00-048) Richard Waymire (Jul 11)
- Remote Denial Of Service -- NetWare 5.0 with SP 5 Dimuthu Parussalla (Jul 10)
- Re: Remote Denial Of Service -- NetWare 5.0 with SP 5 Conrad Wood (Jul 13)
- Re: Microsoft Security Bulletin (MS00-048) Mikael Olsson (Jul 11)
- Remote Denial Of Service -- NetWare 5.0 with SP 5 Dimuthu Parussalla (Jul 10)