7761522 2002-01-07 17:01 -0500 /117 rader/ <bugzilla@redhat.com>
Sänt av: joel@lysator.liu.se
Importerad: 2002-01-08 03:08 av Brevbäraren
Extern mottagare: redhat-watch-list@redhat.com
Extern kopiemottagare: bugtraq@securityfocus.com
Extern kopiemottagare: linux-security@redhat.com
Mottagare: Bugtraq (import) <20415>
Ärende: [RHSA-2002:002-10] Updated stunnel packages available.
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From: bugzilla@redhat.com
To: redhat-watch-list@redhat.com
Cc: bugtraq@securityfocus.com, linux-security@redhat.com
Message-ID: <200201072201.g07M1Or07278@porkchop.redhat.com>
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Red Hat, Inc. Red Hat Security Advisory
Synopsis: Updated stunnel packages available.
Advisory ID: RHSA-2002:002-10
Issue date: 2002-01-01
Updated on: 2002-01-03
Product: Red Hat Linux
Keywords: stunnel format string vulnerability
Cross references:
Obsoletes: RHSA-2000:137
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1. Topic:
Updated stunnel packages are now available for Red Hat Linux 7.2.
These updates close a format-string vulnerability which is present in
some earlier versions of stunnel.
2. Relevant releases/architectures:
Red Hat Linux 7.2 - i386, ia64
3. Problem description:
Stunnel is an SSL wrapper for applications. One feature of Stunnel
is the ability to negotiate SSL with protocols using the '-n'
flag. There are format string bugs present in the functions which
implement smtp, pop, and nntp client negotiations as supplied with
Stunnel versions 3.15 up to 3.21c.
If you use Stunnel with the '-n smtp', '-n pop', '-n nntp' options
with the client mode '-c' option, a malicous server could abuse the
format string bug to run arbitrary code as the owner of the Stunnel
process. The packages included update Stunnel to version 3.22 which
is not vulnerable to this bug.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2002-0002 to this issue.
4. Solution:
Before applying this update, make sure you have applied all previously
released errata relevant to your system.
To update all RPMs for your particular architecture, run:
rpm -Fvh [filenames]
where [filenames] is a list of the RPMs you wish to upgrade. Only
those RPMs which are currently installed will be updated. Those RPMs
which are not installed but included in the list will not be updated.
Note that you can also use wildcards (*.rpm) if your current
directory *only* contains the desired RPMs.
Please note that this update is also available via Red Hat Network.
Many people find this an easier way to apply updates. To use Red Hat
Network, launch the Red Hat Update Agent with the following command:
up2date
This will start an interactive process that will result in the
appropriate RPMs being upgraded on your system.
5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):
6. RPMs required:
Red Hat Linux 7.2:
SRPMS:
ftp://updates.redhat.com/7.2/en/os/SRPMS/stunnel-3.22-1.src.rpm
i386:
ftp://updates.redhat.com/7.2/en/os/i386/stunnel-3.22-1.i386.rpm
ia64:
ftp://updates.redhat.com/7.2/en/os/ia64/stunnel-3.22-1.ia64.rpm
7. Verification:
MD5 sum Package Name
--------------------------------------------------------------------------
b0a3367f7369841f615b57e9de234703 7.2/en/os/SRPMS/stunnel-3.22-1.src.rpm
b62a3f6c4418550873602147697213b0 7.2/en/os/i386/stunnel-3.22-1.i386.rpm
6cc2a3665a608922159d583d1401ad20 7.2/en/os/ia64/stunnel-3.22-1.ia64.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at:
http://www.redhat.com/about/contact/pgpkey.html
You can verify each package with the following command:
rpm --checksig <filename>
If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
rpm --checksig --nogpg <filename>
8. References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0002
http://marc.theaimsgroup.com/?l=stunnel-users&m=100868569203440
http://marc.theaimsgroup.com/?l=stunnel-users&m=100913948312986
Copyright(c) 2000, 2001, 2002 Red Hat, Inc.
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