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
3.8 KiB
Text
99 lines
3.8 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-00:35 Security Advisory
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FreeBSD, Inc.
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Topic: proftpd port contains remote root compromise
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Category: ports
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Module: proftpd
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Announced: 2000-08-14
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Credits: lamagra <lamagra@DIGIBEL.ORG>
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Affects: Ports collection prior to the correction date.
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Corrected: 2000/07/28
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Vendor status: Updated version released
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FreeBSD only: NO
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I. Background
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proftpd is a popular FTP server.
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II. Problem Description
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The proftpd port, versions prior to 1.2.0rc2, contains a vulnerability
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which allows FTP users, both anonymous FTP users and those with a
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valid account, to execute arbitrary code as root on the local machine,
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by inserting string-formatting operators into command input, which are
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incorrectly parsed by the FTP server.
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This is the same class of vulnerability as the one described in
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FreeBSD Security Advisory 00:29, which pertained to the wu-ftpd port.
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The proftpd port is not installed by default, nor is it "part of
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FreeBSD" as such: it is part of the FreeBSD ports collection, which
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contains nearly 3700 third-party applications in a ready-to-install
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format. The ports collections shipped with FreeBSD 3.5 contains this
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problem since it was discovered after the release, but FreeBSD 4.1 did
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not ship with the proftpd package (and the port was disabled to
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prevent building) because the vulnerability was known but not yet
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fixed.
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FreeBSD makes no claim about the security of these third-party
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applications, although an effort is underway to provide a security
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audit of the most security-critical ports.
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III. Impact
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FTP users, including anonymous FTP users, can cause arbitrary commands
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to be executed as root on the local machine.
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If you have not chosen to install the proftpd port/package, then your
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system is not vulnerable to this problem.
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IV. Workaround
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Deinstall the proftpd port/package, if you you have installed it.
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V. Solution
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One of the following:
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1) Upgrade your entire ports collection and rebuild the proftpd port.
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2) Deinstall the old package and install a new package dated after the
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correction date, obtained from:
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/ftp/proftpd-1.2.0rc2.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/ftp/proftpd-1.2.0rc2.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/ftp/proftpd-1.2.0rc2.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/ftp/proftpd-1.2.0rc2.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/ftp/proftpd-1.2.0rc2.tgz
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NOTE: It may be several days before updated packages are available.
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3) download a new port skeleton for the proftpd port from:
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http://www.freebsd.org/ports/
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and use it to rebuild the port.
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4) Use the portcheckout utility to automate option (3) above. The
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portcheckout port is available in /usr/ports/devel/portcheckout or the
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package can be obtained from:
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/portcheckout-2.0.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz
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