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)
104 lines
3.7 KiB
Text
104 lines
3.7 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-02:10 Security Advisory
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FreeBSD, Inc.
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Topic: rsync port contains remotely exploitable vulnerability
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Category: ports
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Module: rsync
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Announced: 2002-02-06
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Credits: Sebastian Krahmer <krahmer@suse.de>
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Affects: Ports collection prior to the correction date
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Corrected: 2002-01-23 23:32:21 UTC
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FreeBSD only: NO
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I. Background
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rsync is a powerful network file distribution/synchronization utility.
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II. Problem Description
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The rsync port, versions prior to rsync-2.5.1_1, is not careful enough
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about reading integers from the network. In several places, signed and
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unsigned numbers are mixed, resulting in erroneous computations of
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buffer offsets.
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The rsync 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 over 6000 third-party applications in a ready-to-install
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format. The ports collection shipped with FreeBSD 4.5 contains the
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corrected version of this port (rsync-2.5.1_1).
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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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A remote attacker may cause rsync to write NUL bytes onto its stack.
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This can be exploited in order to execute arbitrary code with the
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privileges of the user running rsync. This is particularly damaging
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for sites running rsync in server mode, although a hostile server may
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also affect rsync clients.
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IV. Workaround
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1) Deinstall the rsync ports/packages if you have them installed.
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V. Solution
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1) Upgrade your entire ports collection and rebuild the 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 the following directories:
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[i386]
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/net/rsync-2.5.1_1.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/net/rsync-2.5.1_1.tgz
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[alpha]
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Packages are not automatically generated for the alpha architecture at
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this time due to lack of build resources.
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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 rsync 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-4-stable/Latest/portcheckout.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/Latest/portcheckout.tgz
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VI. Correction details
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The following list contains the $FreeBSD$ revision numbers of each
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file that was corrected in the FreeBSD source.
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Path Revision
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- -------------------------------------------------------------------------
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ports/net/rsync/Makefile 1.61
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ports/net/rsync/files/patch-251-secfix 1.1
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- -------------------------------------------------------------------------
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VII. References
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<URL:http://rsync.samba.org/>
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<URL:http://www.securityfocus.com/advisories/3826>
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