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)
106 lines
3.9 KiB
Text
106 lines
3.9 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-01:60 Security Advisory
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FreeBSD, Inc.
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Topic: Multiple vulnerabilities in procmail signal handling
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Category: ports
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Module: procmail
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Announced: 2001-09-24
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Credits: Philip A. Guenther <guenther@sendmail.com>
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Affects: Ports collection prior to the correction date.
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Corrected: 2001-06-29 06:46:38 2001 UTC
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FreeBSD only: NO
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I. Background
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procmail is an incoming mail processor, typically used to implement
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mail filters as well as sorting incoming mail into folders.
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II. Problem Description
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procmail versions prior to procmail 3.20 performed unsafe actions
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while in the signal handlers. If a signal is delivered while procmail
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is already in an unsafe signal handler, undefined behaviour may
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result, possibly leading to the ability to perform actions as the
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superuser under unprivileged local user control.
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The procmail 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 5900 third-party applications in a ready-to-install
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format. The ports collection shipped with FreeBSD 4.4 is not
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vulnerable to this problem since it was discovered before its 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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Because procmail runs setuid root, a local attacker may be able to
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take advantage of these problems in order to obtain superuser
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privileges, although there are no known exploits as of the date of
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this advisory.
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IV. Workaround
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1) Deinstall the procmail port/package if you have it installed.
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V. Solution
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The port procmail-3.20 and later versions include fixes for these
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vulnerabilities.
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1) Upgrade your entire ports collection and rebuild the procmail 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/mail/procmail-3.21.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/mail/procmail-3.21.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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3) Download a new port skeleton for the procmail 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/mail/procmail/Makefile 1.38
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ports/mail/procmail/distinfo 1.11
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- -------------------------------------------------------------------------
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VII. References
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<URL:http://www.somelist.com/mail.php/282/view/1200950>
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<URL:http://www.xray.mpe.mpg.de/mailing-lists/procmail/2001-06/msg00369.html>
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