|
|
The cyrus imapd contains a buffer overflow which could be exploited by remote attackers prior to logging in. Attackers could generate oversized error messages and overflow buffers inside imapd. Additionally to this fix, an overflow in the SASL library (as used by the cyrus imapd) has been fixed. This bug only affects SuSE Linux 8.1, the SuSE Linux Enterprise Server 8 and the SuSE Linux Openexchange Server.
|
|
-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
SuSE Security Announcement
Package: cyrus-imapd
Announcement-ID: SuSE-SA:2002:048
Date: Fri Dec 20 18:00:00 MET 2002
Affected products: 7.1, 7.2, 7.3, 8.0, 8.1,
SuSE eMail Server III, 3.1,
SuSE Linux Connectivity Server,
SuSE Linux Enterprise Server 7,
SuSE Linux Enterprise Server 8,
SuSE Linux Office Server,
SuSE Linux Openexchange Server 4
Vulnerability Type: remote command execution
Severity (1-10): 6
SuSE default package: no
Cross References: -
Content of this advisory:
1) security vulnerability resolved: Buffer overflows in cyrus-imapd.
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- MySQL
- traceroute
- CUPS
- imap-2000c
3) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion, solution, upgrade information
The cyrus imapd contains a buffer overflow which could be exploited
by remote attackers prior to logging in. Attackers could generate oversized
error messages and overflow buffers inside imapd.
Additionally to this fix, an overflow in the SASL library (as used by the
cyrus imapd) has been fixed. This bug only affects SuSE Linux 8.1, the
SuSE Linux Enterprise Server 8 and the SuSE Linux Openexchange Server.
Since there is no workaround possible except shutting down the IMAP server,
we strongly recommend an update.
Please download the update package for your distribution and verify its
integrity by the methods listed in section 3) of this announcement.
Then, install the package using the command "rpm -Fhv file.rpm" to apply
the update.
Our maintenance customers are being notified individually. The packages
are being offered to install from the maintenance web.
To be sure the update takes effect you have to restart the IMAP server
by executing the following commands as root:
/etc/rc.d/cyrus restart
and (if using saslauthd)
/etc/rc.d/saslauthd restart
i386 Intel Platform:
SuSE-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cyrus-imapd-2.1.9-41.i586.rpm
47785bc84eeebbddcd50a267684d6500
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cyrus-sasl2-2.1.7-52.i586.rpm
b740ad1a675f2c14ffc33097a1c41ee5
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cyrus-imapd-2.1.9-41.i586.patch.rpm
0119fa57ef939939357dd86cd1ec1ea6
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cyrus-sasl2-2.1.7-52.i586.patch.rpm
fbf3bad7c6542e45d699c0d69b0798c0
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/cyrus-imapd-2.1.9-41.src.rpm
a51f1b81249cad5e48e5d05535ae2ab8
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/cyrus-sasl2-2.1.7-52.src.rpm
98cba687c3d2c89761cc6e9b34cd7e71
SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/cyrus-imapd-2.0.16-361.i386.rpm
3dd8c8c26753cddb56f9adb2e0a352fe
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/cyrus-imapd-2.0.16-361.i386.patch.rpm
612e6f1652c536b316a6a480389dc729
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/cyrus-imapd-2.0.16-361.src.rpm
7c4cd098d4c96726fc2ed21597a8ae3c
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/cyrus-imapd-2.0.16-361.i386.rpm
bd294c4539c895d16ff11fc8298a6c44
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/cyrus-imapd-2.0.16-361.src.rpm
689bd12bc2fefc627dd13b45cca68922
SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/cyrus-imapd-2.0.16-362.i386.rpm
feb98be591cd938dee6fbff1b09e11d0
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/cyrus-imapd-2.0.16-362.src.rpm
2beb58cb743a0923cefbceccea871df2
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/i386/update/7.1/n2/cyrus-imapd-2.0.12-69.i386.rpm
61f850212a2d2ae72a7446df3b96e891
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/cyrus-imapd-2.0.12-69.src.rpm
77252f38facbbde01839e817a2f0514d
Sparc Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/cyrus-imapd-2.0.16-58.sparc.rpm
093642ae51cad7a03660ea5b89dd533e
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/cyrus-imapd-2.0.16-58.src.rpm
4e1bc8e98e61918cce6976c7c373bc53
AXP Alpha Platform:
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/axp/update/7.1/n2/cyrus-imapd-2.0.12-24.alpha.rpm
4194ee9cc379d0d8448029480c7b36b3
source rpm(s):
ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/cyrus-imapd-2.0.12-24.src.rpm
08ab826ab71a531bb51c12b7fed19919
PPC Power PC Platform:
SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/cyrus-imapd-2.0.16-208.ppc.rpm
3d57fefb8f9d23a6e863652f148fd4ff
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/cyrus-imapd-2.0.16-208.src.rpm
4e883ee340e061c948c1835aff15e50b
SuSE-7.1:
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n2/cyrus-imapd-2.0.12-32.ppc.rpm
d518ece0e01cf731ab2d19c73c82a2de
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/cyrus-imapd-2.0.12-32.src.rpm
d61b35b30f5704194506ec1238f741bf
______________________________________________________________________________
2) Pending vulnerabilities in SuSE Distributions and Workarounds:
- MySQL
Stefan Esser from e-matters discovered security critical bugs in the
MySQL server and client libraries. New packages are currently being built
and will soon be available. We will inform you with a separate advisory
when all packages for all platforms are available.
- traceroute
The recent update for the traceroute package did not fix all overflows
properly. New packages have been prepared and should already be available
on our ftp servers. The newly found bugs are not critical since the last
update for traceroute drops the superuser privileges before the overflow
can be triggered. However since the attacker could gain access to a raw
socket upon successfull exploitation, an update is recommended.
- CUPS
iDEFENSE reported various bugs in the CUPS printing system. These bugs could
lead to a remote compromise of the system. New packages are already available
on our ftp servers. We will inform you with a separate advisory when all
packages for all platforms are available.
- imap-2000c
The IMAP implementation of the University of Washington contained a buffer
overflow. This overflow happens after the authentication phase, so only
remote attackers with a valid IMAP account can exploit this bug. They will
obtain a shell with their user privileges if exploited properly. ;-)
Only versions less or eqal to imap-2000c (as shipped up to SL 7.3) are
affected.
The author of this imapd does not offer patches for older versions but
rather suggests to use the newest version available at
ftp://ftp.cac.washington.edu/mail/imap.tar.Z
Due to the habbit of the author and the little impact of this bug, we
do not provide patched pre-build packages.
______________________________________________________________________________
3) standard appendix: authenticity verification, additional information
- Package authenticity verification:
SuSE update packages are available on many mirror ftp servers all over
the world. While this service is being considered valuable and important
to the free and open source software community, many users wish to be
sure about the origin of the package and its content before installing
the package. There are two verification methods that can be used
independently from each other to prove the authenticity of a downloaded
file or rpm package:
1) md5sums as provided in the (cryptographically signed) announcement.
2) using the internal gpg signatures of the rpm package.
1) execute the command
md5sum <name-of-the-file.rpm>
after you downloaded the file from a SuSE ftp server or its mirrors.
Then, compare the resulting md5sum with the one that is listed in the
announcement. Since the announcement containing the checksums is
cryptographically signed (usually using the key security@suse.de),
the checksums show proof of the authenticity of the package.
We disrecommend to subscribe to security lists which cause the
email message containing the announcement to be modified so that
the signature does not match after transport through the mailing
list software.
Downsides: You must be able to verify the authenticity of the
announcement in the first place. If RPM packages are being rebuilt
and a new version of a package is published on the ftp server, all
md5 sums for the files are useless.
2) rpm package signatures provide an easy way to verify the authenticity
of an rpm package. Use the command
rpm -v --checksig <file.rpm>
to verify the signature of the package, where <file.rpm> is the
filename of the rpm package that you have downloaded. Of course,
package authenticity verification can only target an un-installed rpm
package file.
Prerequisites:
a) gpg is installed
b) The package is signed using a certain key. The public part of this
key must be installed by the gpg program in the directory
~/.gnupg/ under the user's home directory who performs the
signature verification (usually root). You can import the key
that is used by SuSE in rpm packages for SuSE Linux by saving
this announcement to a file ("announcement.txt") and
running the command (do "su -" to be root):
gpg --batch; gpg < announcement.txt | gpg --import
SuSE Linux distributions version 7.1 and thereafter install the
key "build@suse.de" upon installation or upgrade, provided that
the package gpg is installed. The file containing the public key
is placed at the top-level directory of the first CD (pubring.gpg)
and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de .
- SuSE runs two security mailing lists to which any interested party may
subscribe:
suse-security@suse.com
- general/linux/SuSE security discussion.
All SuSE security announcements are sent to this list.
To subscribe, send an email to
<suse-security-subscribe@suse.com>.
suse-security-announce@suse.com
- SuSE's announce-only mailing list.
Only SuSE's security announcements are sent to this list.
To subscribe, send an email to
<suse-security-announce-subscribe@suse.com>.
For general information or the frequently asked questions (faq)
send mail to:
<suse-security-info@suse.com> or
<suse-security-faq@suse.com> respectively.
=====================================================================
SuSE's security contact is <security@suse.com> or <security@suse.de>.
The <security@suse.de> public key is listed below.
=====================================================================
______________________________________________________________________________
The information in this advisory may be distributed or reproduced,
provided that the advisory is not modified in any way. In particular,
it is desired that the clear-text signature shows proof of the
authenticity of the text.
SuSE Linux AG makes no warranties of any kind whatsoever with respect
to the information contained in this security advisory.
Type Bits/KeyID Date User ID
pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team <security@suse.de>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>
- -----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org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=LRKC
- -----END PGP PUBLIC KEY BLOCK-----
-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
iQEVAwUBPgNajney5gA9JdPZAQHuDgf+N7BDJ1oBJvpmwS95UbvmOoAlG9kGDa8V
K0s9O/oew6uyURbt1KS7Po2qvhx1xEaFLGzWIudSOoCunVcQj41K7zGZ7stO8BiG
7kft7Ku8DS9lamH6WRnADISPitGP832fXMdw+L5QfoZOrCRAmgljeT4NXJCQ7tHc
Oa16g+qS1pdTWY6D/RaX8o1JRL9YBMfnWPXMFwkDBJVrjFDvsXUl3ahY2RO7Ey8M
CYzYetRJBwlz5XXxd2zrXD/KS/qrVNTi3tn1F0KEmDUE50u4jPK8gE68ob2UjKRO
nPOy1STIGhAXoynniPKsW66MV0/CL5m7jfITM02uIVi93UD1/Rpuxg==
=l4Bg
-----END PGP SIGNATURE-----
--
~
~ perl self.pl
~ $_='print"$_=47$_47;eval"';eval
~ krahmer@suse.de - SuSE Security Team
~
--
To unsubscribe, e-mail: suse-security-announce-unsubscribe@suse.com
For additional commands, e-mail: suse-security-announce-help@suse.com
This archive was generated by hypermail 2.1.4
: Fri Dec 20 2002 - 19:05:59 CET
| 
