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)
117 lines
4.4 KiB
Text
117 lines
4.4 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-00:39 Security Advisory
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FreeBSD, Inc.
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Topic: Two vulnerabilities in Netscape
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Category: ports
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Module: netscape
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Announced: 2000-08-28
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Credits: Solar Designer <solar@FALSE.COM> (Vulnerability #1)
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Dan Brumleve <dan+Bsecurity@brumleve.com> (Vulnerability #2)
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Affects: Ports collection prior to the correction date.
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Corrected: 2000-08-19
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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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Netscape is a popular web browser, available in several versions in
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the FreeBSD ports collection.
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II. Problem Description
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There are two security problems in recent versions of netscape:
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1) Versions prior to 4.74
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A client-side exploit may be possible through a buffer overflow in
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JPEG-handling code. Although an exploit is not known, attackers may be
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able to execute arbitrary code on the local machine as the user
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running netscape, or at the very least cause the netscape binary to
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crash.
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2) Versions prior to 4.75
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The Java Virtual Machine implementation has security vulnerabilities
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allowing a remote user to read the contents of local files accessible
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to the user running netscape, and to allow these files to be
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transmitted to any user on the internet.
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The netscape ports are not installed by default, nor are they "part of
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FreeBSD" as such: they are part of the FreeBSD ports collection, which
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contains over 3700 third-party applications in a ready-to-install
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format. The ports collections shipped with FreeBSD 3.5 and 4.1 are
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vulnerable to these problems.
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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 can read files on the local system accessible to the user
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running netscape, if java is enabled, and may be able to execute
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arbitrary code on the local system as that user.
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If you have not chosen to install a netscape 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 netscape port/package, if you you have installed it.
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Vulnerability 2) can be worked around by disabling Java in the
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"Advanced" section of the Preferences control panel. Vulnerability 1)
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can be worked around by disabling the "Automatically load images"
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option in the same location, although this is not a very practical
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workaround.
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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 relevant
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netscape 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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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/www/
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/www/
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/www/
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/www/
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/www/
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Since there are so many variations of the netscape ports in the
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FreeBSD ports collection they are not listed separately
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here. Localized versions are also available in the respective language
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subdirectory.
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3) download a new port skeleton for the netscape 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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