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)
94 lines
3.5 KiB
Text
94 lines
3.5 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-00:48 Security Advisory
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FreeBSD, Inc.
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Topic: xchat port inappropriately handles URLs
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Category: ports
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Module: xchat, xchat-devel
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Announced: 2000-09-13
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Affects: Ports collection.
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Corrected: 2000-08-27
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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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Xchat is a popular graphical IRC client.
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II. Problem Description
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The xchat IRC client provides the ability to launch URLs displayed in
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an IRC window in a web browser by right clicking on the URL. However
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this was handled incorrectly in versions prior to 1.4.3, and prior to
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1.5.7 in the 1.5 development series, and allowed a malicious IRC user
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to embed command strings in a URL which could cause an arbitrary
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command to be executed as the local user if the URL were to be
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"launched" in a browser as described above.
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The xchat 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 3800 third-party applications in a ready-to-install
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format. The ports collections shipped with FreeBSD 4.0 and 3.5.1
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contain this problem since it was discovered after the release.
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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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Remote IRC users can cause an arbitrary command to be executed by the
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local user, if they attempt to launch a malformed URL by right
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clicking on it.
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If you have not chosen to install the xchat or xchat-devel
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ports/packages, then your system is not vulnerable to this problem.
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IV. Workaround
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Do not attempt to launch URLs which contain the ` (backtick) character.
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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 xchat or
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xchat-devel 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/irc/xchat-1.4.3.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/irc/xchat-1.4.3.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/irc/xchat-1.4.3.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/irc/xchat-1.4.3.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/irc/xchat-1.4.3.tgz
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3) download a new port skeleton for the xchat 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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