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)
97 lines
3.8 KiB
Text
97 lines
3.8 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-01:04 Security Advisory
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FreeBSD, Inc.
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Topic: joe creates insecure recovery files
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Category: ports
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Module: joe
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Announced: 2001-01-15
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Credits: Christer Öberg and Patrik Birgersson,
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of Wkit Security AB
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Affects: Ports collection prior to the correction date.
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Corrected: 2000-12-12
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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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joe is a text editor.
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II. Problem Description
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The joe port, versions prior to 2.8_2, contains a local vulnerability:
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if a joe session with an unsaved file terminates abnormally, joe
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creates a rescue copy of the file called ``DEADJOE'' in the same
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directory as the file being edited. The creation of this copy is made
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without checking if the file is a symbolic link. If the file is a
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link, joe will append the contents of the unsaved file to the linked
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file: therefore if the joe editor is run on a private file in a public
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directory such as /tmp, an attacker can access the contents of the
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edited file by causing it to be appended to a world-writable file
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owned by the attacker if the joe process terminates abnormally.
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The joe port is not installed by default, nor is it "part of FreeBSD"
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as such: it is part of the FreeBSD ports collection, which contains
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nearly 4500 third-party applications in a ready-to-install format.
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The ports collections shipped with FreeBSD 3.5.1 and 4.2 contain this
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problem since it was discovered after the releases.
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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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Malicious local users, under certain restricted conditions, may obtain
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read access to non-readable files edited using the joe editor.
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If you have not chosen to install the joe 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 joe port/package, if 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 joe 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/editors/joe-2.8_2.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/editors/joe-2.8_2.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/editors/joe-2.8_2.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/editors/joe-2.8_2.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/editors/joe-2.8_2.tgz
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3) download a new port skeleton for the joe 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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