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
3.9 KiB
Text
99 lines
3.9 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-00:45 Security Advisory
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FreeBSD, Inc.
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Topic: esound port allows file permissions to be modified
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Category: ports
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Module: esound
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Announced: 2000-08-31
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Credits: Brian Feldman <green@FreeBSD.org> during internal auditing
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Affects: Ports collection prior to the correction date
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Corrected: 2000-06-30
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Vendor status: Contacted
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FreeBSD only: NO
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I. Background
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EsounD is a component of the GNOME desktop environment which is
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responsible for multiplexing access to audio devices.
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II. Problem Description
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The esound port, versions 0.2.19 and earlier, creates a world-writable
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directory in /tmp owned by the user running the EsounD session, which
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is used for the storage of a unix domain socket. A race condition
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exists in the creation of this socket which allows a local attacker to
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cause an arbitrary file or directory owned by the user running esound
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to become world-writable. This can give the attacker access to the
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victim's account, or lead to a system compromise if esound is run by
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root.
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The esound 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 3700 third-party applications in a ready-to-install
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format. The ports collections shipped with FreeBSD 4.0 and 3.5 contain
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this problem, but it was corrected prior to the release of FreeBSD
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4.1.
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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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Local users can cause files or directories owned by the target user to
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become world-writable when that user runs the esd daemon (e.g. by
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starting a GNOME session), allowing a security breach of that user
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account (or the entire system if esd is run by root)
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If you have not chosen to install the esound 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 esound port/package, if you have installed it (see the
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pkg_delete(1) manual page for more information).
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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 esound 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/audio/esound-0.2.19.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/audio/esound-0.2.19.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/audio/esound-0.2.19.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/audio/esound-0.2.19.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/audio/esound-0.2.19.tgz
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3) download a new port skeleton for the esound 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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