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)
106 lines
4.3 KiB
Text
106 lines
4.3 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-00:37 Security Advisory
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FreeBSD, Inc.
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Topic: cvsweb allows increased access to CVS committers
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Category: ports
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Module: cvsweb
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Announced: 2000-08-14
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Credits: Joey Hess <joey@kitenet.net>
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Affects: Ports collection prior to the correction date.
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Corrected: 2000-07-11
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Vendor status: Patch released
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FreeBSD only: NO
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I. Background
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cvsweb is a CGI script which provides a read-only interface to a CVS
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repository for browsing via a web interface.
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II. Problem Description
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The cvsweb port, versions prior to 1.86, contains a vulnerability
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which allows users with commit access to a CVS repository monitored by
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cvsweb to execute arbitrary code as the user running the cvsweb.cgi
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script, which may be located on another machine where the committer
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has no direct access. The vulnerability is that cvsweb does not
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correctly process input obtained from the repository and is vulnerable
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to embedding of commands in committed filenames. Such an action is
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however usually highly visible in the CVS repository and provides an
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audit trail of sorts for such abuses unless the committer has access
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to modify the repository files directly to cover his or her tracks.
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This vulnerability may or may not be a security issue depending on the
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local security policy (for example, CVS itself is known to easily
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allow committers to execute commands on the CVS server even without a
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login account, so this presents little additional exposure if cvsweb
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is run on the CVS server itself).
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The cvsweb 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 nearly 3700 third-party applications in a ready-to-install
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format. The ports collections shipped with FreeBSD 3.5 contains this
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problem since it was discovered after the release, but it was fixed
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prior to the release of FreeBSD 4.1.
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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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CVS committers can execute code as the user running the cvsweb.cgi
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script, which may present a violation of local security policy.
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If you have not chosen to install the cvsweb 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 cvsweb 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 cvsweb 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/devel/cvsweb-1.93.1.10.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/cvsweb-1.93.1.10.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/cvsweb-1.93.1.10.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/cvsweb-1.93.1.10.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/cvsweb-1.93.1.10.tgz
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NOTE: It may be several days before updated packages are available.
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3) download a new port skeleton for the cvsweb 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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