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)
85 lines
2.8 KiB
Text
85 lines
2.8 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-00:09 Security Advisory
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FreeBSD, Inc.
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Topic: mtr port contains a local root exploit.
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Category: ports
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Module: mtr
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Announced: 2000-03-15
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Affects: Ports collection before the correction date.
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Corrected: 2000-03-07 (included in FreeBSD 4.0-RELEASE)
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FreeBSD only: NO
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I. Background
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mtr ("Multi Traceroute") combines the functionality of the "traceroute" and
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"ping" programs into a single network diagnostic tool.
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II. Problem Description
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The mtr program (versions 0.41 and below) fails to correctly drop setuid
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root privileges during operation, allowing a local root compromise.
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The mtr port is not installed by default, nor is it "part of FreeBSD" as
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such: it is part of the FreeBSD ports collection, which contains over 3100
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third-party applications in a ready-to-install format. The FreeBSD
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4.0-RELEASE ports collection is not vulnerable to this problem.
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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 audit of
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the most security-critical ports.
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III. Impact
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A local user can exploit the security hole to obtain root privileges.
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If you have not chosen to install the mtr port/package, then your system is
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not vulnerable.
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IV. Workaround
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1) Remove the mtr port if you have installed it.
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2) Disable the setuid bit - run the following command as root:
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chmod u-s /usr/local/sbin/mtr
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This will mean non-root users cannot make use of the program, since it
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requires root privileges to properly run.
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V. Solution
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1) Upgrade your entire ports collection and rebuild the mtr port.
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2) Reinstall a new package obtained from:
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/net/mtr-0.42.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-current/net/mtr-0.42.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-current/net/mtr-0.42.tgz
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Note: it may be several days before the updated packages are available.
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3) download a new port skeleton for the mtr 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/packages/devel/portcheckout-1.0.tgz
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