Date: Tue, 23 Jan 2001 21:56:38 -0500 From: Chris Faulhaber <jedgar@fxp.org> To: freebsd-security@FreeBSD.org Subject: tinyproxy advisory Message-ID: <20010123215638.B47775@peitho.fxp.org>
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=============================================================================
FreeBSD-SA-01:XX Security Advisory
FreeBSD, Inc.
Topic: tinyproxy contains multiple remote vulnerabilities
Category: ports
Module: tinyproxy
Announced: 2001-XX-XX
Credits: |CyRaX| <cyrax@pkcrew.org>
Affects: Ports collection prior to the correction date.
Corrected: 2001-01-22
Vendor status: Updated version released
FreeBSD only: NO
I. Background
tinyproxy is a lightweight http proxy
II. Problem Description
The tinyproxy port, versions prior to 1.3.3a, contains multiple
remote vulnerabilities. Due to a heap overflow, malicious remote
users can cause a denial-of-service by crashing the proxy.
Additionally, the attacker may potentially cause arbitrary code to
be executed as the user running tinyproxy.
The tinyproxy port is not installed by default, nor is it "part of
FreeBSD" as such: it is part of the FreeBSD ports collection, which
contains over 4200 third-party applications in a ready-to-install
format. The ports collections shipped with FreeBSD 3.5.1 and 4.2
contain this problem since it was discovered after the releases.
FreeBSD makes no claim about the security of these third-party
applications, although an effort is underway to provide a security
audit of the most security-critical ports.
III. Impact
Malicious remote users may cause a denial-of-service and potentially
cause arbitrary code to be executed.
If you have not chosen to install the tinyproxy port/package, then
your system is not vulnerable to this problem.
IV. Workaround
Deinstall the tinyproxy port/package, if you have installed it.
V. Solution
One of the following:
1) Upgrade your entire ports collection and rebuild the tinyproxy port.
2) Deinstall the old package and install a new package dated after the
correction date, obtained from:
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/www/tinyproxy-1.3.3a.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/www/tinyproxy-1.3.3a.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/www/tinyproxy-1.3.3a.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/www/tinyproxy-1.3.3a.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/www/tinyproxy-1.3.3a.tgz
NOTE: It may be several days before updated packages are available.
3) download a new port skeleton for the tinyproxy port from:
http://www.freebsd.org/ports/
and use it to rebuild the port.
4) Use the portcheckout utility to automate option (3) above. The
portcheckout port is available in /usr/ports/devel/portcheckout or the
package can be obtained from:
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz
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