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)
105 lines
3.8 KiB
Text
105 lines
3.8 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-01:41 Security Advisory
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FreeBSD, Inc.
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Topic: hanterm ports allow local root compromise
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Category: ports
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Module: ko-hanterm, ko-hanterm-xf
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Announced: 2001-07-09
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Credits: ksecurity@iland.co.kr
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Affects: Ports collection prior to the correction date.
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Corrected: 2001-05-29
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Vendor status: Contacted
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FreeBSD only: NO
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I. Background
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hanterm is a modified version of xterm which supports Korean language
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entry and display. It is included in the FreeBSD ports collection in
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two versions: ko-hanterm and ko-hanterm-xf.
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II. Problem Description
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The hanterm binary is installed with setuid root permissions, but
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contains insecure code which allows unprivileged local users to obtain
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root access on the local system.
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The hanterm ports are 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 5400 third-party applications in a ready-to-install
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format. The ports collections shipped with FreeBSD 4.3 contain 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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Unprivileged local users can obtain root access on the local system.
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If you have not chosen to install the ko-hanterm or ko-hanterm-xf
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ports/packages, then your system is not vulnerable to this problem.
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IV. Workaround
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1) Deinstall the ko-hanterm and ko-hanterm-xf ports/packages, if you
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have installed them.
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2) Remove the setuid root permission from the /usr/X11R6/bin/hanterm
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file. Execute the following command as root:
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# chmod u-s /usr/X11R6/bin/hanterm
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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
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ko-hanterm/ko-hanterm-xf ports.
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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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[i386]
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ko-hanterm:
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/korean/ko-hanterm-3.1.5_1.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/korean/ko-hanterm-3.1.5_1.tgz
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ko-hanterm-xf:
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/korean/ko-hanterm-xf-19_1.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/korean/ko-hanterm-xf-19_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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3) download a new port skeleton for the ko-hanterm/ko-hanterm-xf port
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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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