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)
92 lines
3.2 KiB
Text
92 lines
3.2 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-01:66 Security Advisory
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FreeBSD, Inc.
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Topic: thttpd port contains remotely vulnerability
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Category: ports
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Module: thttpd
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Announced: 2001-12-11
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Credits: GOBBLES SECURITY
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Affects: Ports collection prior to the correction date
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Corrected: 2001-11-22 00:10:56 UTC
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FreeBSD only: no
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I. Background
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thttpd is a simple, small, portable, fast, and secure HTTP server.
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II. Problem Description
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In auth_check(), there is an off-by-one error in computing the amount
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of memory needed for storing a NUL terminated string. Specifically, a
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stack buffer of 500 bytes is used to store a string of up to 501 bytes
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including the terminating NUL.
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III. Impact
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Due to the location of the affected buffer on the stack, this bug
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can be exploited using ``The poisoned NUL byte'' technique (see
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references). A remote attacker can hijack the thttpd process,
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obtaining whatever privileges it has. By default, the thttpd process
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runs as user `nobody'.
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IV. Workaround
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1) Deinstall the thttpd port/package if you have it installed.
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V. Solution
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1) Upgrade your entire ports collection and rebuild the 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/www/thttpd-2.22.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/www/thttpd-2.22.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 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-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/www/thttpd/Makefile 1.23
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ports/www/thttpd/distinfo 1.20
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ports/www/thttpd/files/patch-fdwatch.c removed
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- -------------------------------------------------------------------------
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VII. References
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<URL:http://www.securityfocus.com/archive/1/241310>
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<URL:http://www.securityfocus.com/archive/1/10884>
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