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)
96 lines
3.8 KiB
Text
96 lines
3.8 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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=============================================================================
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FreeBSD-SA-01:02 Security Advisory
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FreeBSD, Inc.
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Topic: syslog-ng remote denial-of-service
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Category: ports
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Module: syslog-ng
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Announced: 2001-01-15
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Credits: Balazs Scheidler <bazsi@BALABIT.HU>
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Affects: Ports collection prior to the correction date.
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Corrected: 2000-11-25
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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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syslog-ng is a replacement for the standard syslogd daemon, a service
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for logging of local and remote system messages.
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II. Problem Description
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The syslog-ng port, versions prior to 1.4.9, contains a remote
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vulnerability. Due to incorrect log parsing, remote users may cause
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syslog-ng to crash, causing a denial-of-service if the daemon is not
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running under a watchdog process which will automatically restart it
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in the event of failure.
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The syslog-ng 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 4500 third-party applications in a ready-to-install
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format. The ports collections shipped with FreeBSD 3.5.1 and 4.2
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contain this problem since it was discovered after the releases.
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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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Malicious remote attackers may cause syslog-ng to crash, causing a
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denial-of-service if the daemon is not running under a watchdog
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process which will automatically restart it in the event of
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failure. The default installation of the port/package is therefore
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vulnerable to this problem.
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If you have not chosen to install the syslog-ng port/package, then
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your system is not vulnerable to this problem.
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IV. Workaround
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Deinstall the syslog-ng port/package, if 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 syslog-ng 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/sysutils/syslog-ng-1.4.10.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/sysutils/syslog-ng-1.4.10.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/sysutils/syslog-ng-1.4.10.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/sysutils/syslog-ng-1.4.10.tgz
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ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/sysutils/syslog-ng-1.4.10.tgz
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3) download a new port skeleton for the syslog-ng 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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