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______________________________________________________________________________
SUSE Security Announcement
Package: cyrus-sasl,cyrus-sasl2
Announcement-ID: SUSE-SA:2005:013
Date: Thu, 03 Mar 2005 11:00:00 +0000
Affected products: 8.2, 9.0, 9.1, 9.2
SUSE Linux Desktop 1.0
SUSE Linux Enterprise Server 8, 9
Novell Linux Desktop 9
Vulnerability Type: remote code execution
Severity (1-10): 8
SUSE default package: yes
Cross References: CAN-2005-0373
Content of this advisory:
1) security vulnerability resolved:
remote buffer overflow in digestmda5
problem description
2) solution/workaround
3) special instructions and notes
4) package location and checksums
5) pending vulnerabilities, solutions, workarounds:
none
6) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion
cyrus-sasl is a library providing authentication services.
A buffer overflow in the digestmda5 code was identified that could lead
to a remote attacker executing code in the context of the service using
sasl authentication.
This is tracked by the Mitre CVE ID CAN-2005-0373.
2) solution/workaround
Please install the upgraded packages.
3) special instructions and notes
Please restart services using cyrus-sasl for authentication.
4) package location and checksums
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.
x86 Platform:
SUSE Linux 9.1:
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/cyrus-sasl-2.1.18-33.8.i586.rpm
3c8e2d18989cc3503e443eb7fb9cb83d
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/i586/cyrus-sasl-32bit-9.1-200502182137.i586.rpm
bfcc587c9b808fae4409019099be779e
SUSE Linux 9.0:
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/cyrus-sasl-2.1.15-109.i586.rpm
edc54c6bd2e076a20c28c04c1c81c74d
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/i586/cyrus-sasl-32bit-9.0-4.i586.rpm
2c622b4f23c2391b4ee4761face45d3a
SUSE Linux 8.2:
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cyrus-sasl2-2.1.12-66.i586.rpm
9cbb07d4de227affcd4dc151e73ef2d3
x86-64 Platform:
SUSE Linux 9.1:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/cyrus-sasl-2.1.18-33.8.x86_64.rpm
c843a67b5643930310efd2126c664e1c
source rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/cyrus-sasl-2.1.18-33.8.src.rpm
908c30cba8e5407dd0124ad0919b6248
SUSE Linux 9.0:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/cyrus-sasl-2.1.15-109.x86_64.rpm
c9fd563dc21800f7a857b22d70abe55a
source rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/cyrus-sasl-2.1.15-109.src.rpm
8bd0c8cd338120daf7e76c52c137cc9e
______________________________________________________________________________
5) Pending vulnerabilities in SUSE Distributions and Workarounds:
See SUSE Security Summary Report.
______________________________________________________________________________
6) 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
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
to verify the signature of the package, where 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-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
.
For general information or the frequently asked questions (faq)
send mail to:
or
respectively.
=====================================================================
SUSE's security contact is or .
@suse.de>.
The 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
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key
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