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)
107 lines
4.1 KiB
Text
107 lines
4.1 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-00:47 Security Advisory
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FreeBSD, Inc.
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Topic: pine4 port allows denial of service
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Category: ports
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Module: pine4
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Announced: 2000-09-13
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Affects: Ports collection.
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Corrected: 2000-07-17
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Credits: Juhapekka Tolvanen <juhtolv@ST.JYU.FI>
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Vendor status: Contacted
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FreeBSD only: NO
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I. Background
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Pine is a popular mail user agent.
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II. Problem Description
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The pine4 port, versions 4.21 and before, contained a bug which would
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cause the program to crash when processing a folder which contains an
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email message with a malformed X-Keywords header. The message itself
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could be deleted within pine if identified, but other operations such
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as closing the folder with the message still present would cause the
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program to crash with no apparent cause, discarding changes to the
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mailbox.
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The FreeBSD port of pine4 was changed on 2000-07-17 to use an updated
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version of the c-client library which is used to handle the mailbox
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processing. This library does not contain the bug and versions of
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pine4 built with it (i.e. ports or packages dated after the correction
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date) do not suffer from this vulnerability.
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The pine4 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 4.1 and 3.5.1
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contain this 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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Remote users can cause pine4 to crash when closing a mail folder by
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sending a malformed email.
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If you have not chosen to install the pine4 port/package, then
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your system is not vulnerable to this problem.
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IV. Workaround
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Deinstall the pine4 port/package, if you have installed it.
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It may be possible to use a mail filtering utility such as procmail
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(available in FreeBSD ports as /usr/ports/mail/procmail) to filter out
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the malformed X-Keywords header from incoming mail, but this solution
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is not discussed here.
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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 pine4 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/mail/pine-4.21.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/mail/pine-4.21.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/mail/pine-4.21.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/mail/pine-4.21.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/mail/pine-4.21.tgz
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NOTE: Be sure to check the file creation date on the package, because
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the version number of the software has not changed.
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3) download a new port skeleton for the listmanager 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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