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)
95 lines
3.7 KiB
Text
95 lines
3.7 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-00:73 Security Advisory
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FreeBSD, Inc.
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Topic: thttpd allows remote reading of local files
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Category: ports
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Module: thttpd
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Announced: 2000-11-20
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Credits: ghandi@MINDLESS.COM
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Affects: Ports collection prior to the correction date.
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Corrected: 2000-10-30
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Vendor status: Updated version released
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FreeBSD only: NO
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I. Background
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thttpd is a simple, small, fast HTTP server.
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II. Problem Description
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The thttpd port, versions prior to 2.20, allows remote viewing of
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arbitrary files on the local server. The 'ssi' cgi script does not
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correctly restrict URL-encoded requests containing ".." in the path.
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In addition, the cgi script does not have the same restrictions as the
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web server for preventing requests outside of the web root. These two
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flaws allow remote users to access any file on the system accessible
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to the web server user (user 'nobody' in the default configuration).
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The thttpd 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 4100 third-party applications in a ready-to-install
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format. The ports collections shipped with FreeBSD 3.5.1 and 4.1.1
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contain this problem since it was discovered after the releases, but
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it was corrected prior to the release of FreeBSD 4.2.
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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 may access any file on the system accessible to the web
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server user (user 'nobody' in the default installation).
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If you have not chosen to install the thttpd port/package, then your
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system is not vulnerable to this problem.
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IV. Workaround
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Deinstall the thttpd port/package, if you you have installed it.
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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 thttpd 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/www/thttpd-2.20b.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/www/thttpd-2.20b.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/www/thttpd-2.20b.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/www/thttpd-2.20b.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/www/thttpd-2.20b.tgz
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3) download a new port skeleton for the thttpd 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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