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)
103 lines
3.8 KiB
Text
103 lines
3.8 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-02:06 Security Advisory
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FreeBSD, Inc.
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Topic: sudo port may enable local privilege escalation
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Category: ports
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Module: sudo
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Announced: 2002-01-16
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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: 2002-01-15 02:56:33 UTC
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FreeBSD only: NO
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I. Background
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Sudo is a program designed to allow a sysadmin to give limited root
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privileges to users and log root activity.
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II. Problem Description
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The sudo port, versions prior to sudo-1.6.4.1, contains a
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vulnerability that may allow a local user to obtain superuser
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privileges.
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If a user who has not been authorized by the system administrator
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(listed in the `sudoers' file) attempts to use sudo, sudo will send an
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email alert. When it does so, it invokes the system mailer with
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superuser privileges, and with most of the user's environment intact.
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The sudo 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 4.4 contains this
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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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If the system mailer's behavior can be influenced by the settings of
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environmental variables, then an attacker may obtain superuser
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privileges. There is at least one mailer (postfix) that can be
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influenced in this fashion.
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IV. Workaround
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1) Deinstall the sudo port/package if you have it 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/security/sudo-1.6.4.1.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/security/sudo-1.6.4.1.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 sudo 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/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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VI. Correction details
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The following list contains the revision numbers of each file that was
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corrected in the FreeBSD ports collection.
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Path Revision
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- -------------------------------------------------------------------------
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ports/security/sudo/Makefile 1.43
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ports/security/sudo/distinfo 1.26
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- -------------------------------------------------------------------------
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