-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
SuSE Security Announcement
Package: gpg/GnuPG
Announcement-ID: SuSE-SA:2001:020
Date: Sunday, Jun 3rd 2001 14:00 MEST
Affected SuSE versions: 6.3, 6.4, 7.0, 7.1, (7.2)
Vulnerability Type: local privilege escalation
Severity (1-10): 6
SuSE default package: yes
Other affected systems: systems shipping the gpg/GnuPG package
Content of this advisory:
1) security vulnerability resolved: gpg
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds
3) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion, solution, upgrade information
GnuPG (the SuSE package is named "gpg") is a powerful encryption and
signing program with a widespread usership in the free software world.
It is designed to be a replacement for PGP and conforms to the OpenPGP
standard.
A format string vulnerability in versions of GnuPG before 1.0.6 has
been found. The error occurs when gpg encounters a filename suffix that
is not ".gpg" and prints the filename without the suffix as a default
to the terminal. The bug allows an attacker to execute arbitrary code
as the user calling gpg. Werner Koch, the author of the GnuPG package,
states that when the "--batch" commandline option is used (such as
when verifying rpm packages, see Section 3 of this announcement, or
when used in MUAs (Mail User Agent)), the error cannot occur since
this option supresses the printout of the filename on the terminal.
There is no temporary workaround for the problem except for the
"--batch" commandline option to gpg. We recommend to update the gpg
package on all systems where it is installed.
As an additional reason to update the package, it should be noted that
gnupg 1.0.5 (packages were available on our ftp server) fixed some
security-related problems, where one of them could allow an attacker
with access to your key ring to compute the private key in considerably
less time.
We thank Werner Koch, the author of the GnuPG program, for quickly
responding to the problem and fish stiqz, Synnergy Networks, for
finding and communicating the problem to Werner Koch and to the
security community.
Please download the update package from locations described below and check
the authenticity of the rpm package file using a method as described in
section 3) of this security announcement. Please note that the packages
for the 7.1 distribution are located on the ftp.suse.com ftp server, the
packages for older distributions are on ftp.suse.de.
The upcoming SuSE Linux Distribution 7.2 has been officially announced
and will be available for our customers these days. The gpg package in
version 1.0.6 did not make it into the 7.2 distribution. The update
package will be available in the update directory shortly.
Use the command `rpm -Uhv file.rpm' to apply the update.
i386 Intel Platform:
SuSE-7.1
ftp://ftp.suse.com/pub/suse/i386/update/7.1/sec1/gpg-1.0.6-0.i386.rpm
39153126feeddf43a939c89a9b1a33fd
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/gpg-1.0.6-0.src.rpm
318ebedd094da2063ecaf209a9a686be
SuSE-7.0
ftp://ftp.suse.de/pub/suse/i386/update/7.0/sec1/gpg-1.0.6-0.i386.rpm
b78951d79a8c9593a9baf14963c2eb61
source rpm:
ftp://ftp.suse.de/pub/suse/i386/update/7.0/zq1/gpg-1.0.6-0.src.rpm
ea2067aacf9fb45d2a94eba066fdc18b
SuSE-6.4
ftp://ftp.suse.de/pub/suse/i386/update/6.4/sec1/gpg-1.0.6-1.i386.rpm
6050bffa597965475a4caf0a5c265c23
source rpm:
ftp://ftp.suse.de/pub/suse/i386/update/6.4/zq1/gpg-1.0.6-1.src.rpm
320eff2cc72cad2bce555993fbc7cb61
SuSE-6.3
ftp://ftp.suse.de/pub/suse/i386/update/6.3/sec1/gpg-1.0.6-1.i386.rpm
6050bffa597965475a4caf0a5c265c23
source rpm:
ftp://ftp.suse.de/pub/suse/i386/update/6.3/zq1/gpg-1.0.6-1.src.rpm
320eff2cc72cad2bce555993fbc7cb61
Sparc Platform:
SuSE-7.1
ftp://ftp.suse.com/pub/suse/sparc/update/7.1/sec1/gpg-1.0.6-0.sparc.rpm
20d3a3d7d65aee48f281edf0ae2f162c
source rpm:
ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/gpg-1.0.6-0.src.rpm
d827d8e68a306c2d7890a5c113d934d3
SuSE-7.0
ftp://ftp.suse.de/pub/suse/sparc/update/7.0/sec1/gpg-1.0.6-0.sparc.rpm
fca18e28c3442b16d7aaf614a5bda269
source rpm:
ftp://ftp.suse.de/pub/suse/sparc/update/7.0/zq1/gpg-1.0.6-0.src.rpm
797e4f8410e4e4ba159bfc0e3eb7c06c
PPC Power PC Platform:
SuSE-7.1
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/sec1/gpg-1.0.6-0.ppc.rpm
9c4c27fd13e9d27ac712bb37cdbe1972
source rpm:
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/gpg-1.0.6-0.src.rpm
f262178a3b3d92c6382a303c3aba728e
SuSE-7.0
ftp://ftp.suse.de/pub/suse/ppc/update/7.0/sec1/gpg-1.0.6-0.ppc.rpm
378dea2eb7b63ca376330f10757c042e
source rpm:
ftp://ftp.suse.de/pub/suse/ppc/update/7.0/zq1/gpg-1.0.6-0.src.rpm
a1815320cc4537bd18f4c361880c9f44
SuSE-6.4
ftp://ftp.suse.de/pub/suse/ppc/update/6.4/sec1/gpg-1.0.5-3.ppc.rpm
d76adf2f7ab76454b05202df580a0235
source rpm:
ftp://ftp.suse.de/pub/suse/ppc/update/6.4/zq1/gpg-1.0.5-3.src.rpm
bc18a284bfee16e96a2ff7f6749b4cd1
AXP Alpha Platform:
SuSE-7.1
ftp://ftp.suse.com/pub/suse/axp/update/7.1/sec1/gpg-1.0.6-0.alpha.rpm
68f791f8d03e3afbad5ee12b529ecc3c
source rpm:
ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/gpg-1.0.6-0.src.rpm
41a50ddce1b16fd91627ac6b155426f6
SuSE-7.0
ftp://ftp.suse.de/pub/suse/axp/update/7.0/sec1/gpg-1.0.6-0.alpha.rpm
696989a2d730b1dbf3891f6b14c42be3
source rpm:
ftp://ftp.suse.de/pub/suse/axp/update/7.0/zq1/gpg-1.0.6-0.src.rpm
c76556d46b5de45349c146cb9b65b526
SuSE-6.4
ftp://ftp.suse.de/pub/suse/axp/update/6.4/sec1/gpg-1.0.6-1.alpha.rpm
e56719ef69aee3a6758f43317cd205cb
source rpm:
ftp://ftp.suse.de/pub/suse/axp/update/6.4/zq1/gpg-1.0.6-1.src.rpm
6e54ae31543db2c70a3b47f4916e7964
SuSE-6.3
ftp://ftp.suse.de/pub/suse/axp/update/6.3/sec1/gpg-1.0.6-2.alpha.rpm
55cb31d055cfaa7e96908391b075550e
source rpm:
ftp://ftp.suse.de/pub/suse/axp/update/6.3/zq1/gpg-1.0.6-2.src.rpm
e19e2ae8c07e813ff00e65a618046974
______________________________________________________________________________
2) Pending vulnerabilities in SuSE Distributions and Workarounds:
- qpopper
SuSE Linux distributions after SuSE-7.1 contain the qpopper in version
4.x.y. According to the Changelogs of Qpopper 4.0.3 (See
ftp://ftp.qualcomm.com/eudora/servers/unix/popper/), the versions of
qpopper before version 4.0.3 contain a buffer overflow. We are currently
investigating if this bug is exploitable and which versions of qpopper
are affected. We will provide update packages as soon as possible if
necessary. Please see our upcoming security announcements (Section 3 of
this announcement)!
- netscape
Netscape before Version 4.77 contains a bug that allows a remote attacker
to store JavaScript code in the comment field of GIF files that are
contained in a viewed page. This code can be executed.
Update packages for the SuSE Linux distributions 6.3, 6.4, 7.0 and 7.1
can be found on our ftp server at
ftp://ftp.suse.com/pub/suse/i386/update/7.1/xap1/netscape-4.77-21.i386.rpm
1e2de825b3386d80a3731760b9e7f323
ftp://ftp.suse.com/pub/suse/i386/update/7.0/xap1/netscape-4.77-21.i386.rpm
ftp://ftp.suse.com/pub/suse/i386/update/6.4/xap1/netscape-4.77-21.i386.rpm
ftp://ftp.suse.com/pub/suse/i386/update/6.3/xap1/netscape-4.77-21.i386.rpm
13f303944c9ac0863591b03c4eb75501
The packages are gpg-signed. See the section above about downloading
and verifying rpm packages.
The complexity of the netscape browser suggests by nature that more
security related problems will be found, we will not issue a dedicated
security announcement for the netscape package any more. Security-
inclined users may please see the future security announcements in
section 2) for information about security related problems with the
netscape package.
- pine
Most of the supported distributions have pine update packages in the
update area of the ftp server that update the pine package to version
4.33. Many vulnerabilities have been found in versions before 4.33,
and it is recommended to perform the upgrade.
Please note that not all packages have been built yet. See the update
directory for your distribution (like i386/update/7.0/n1) for pine-4.33
packages.
- dqs
dex@raza-mexicana.org has found an exploitable buffer overflow bug in
the dsh program from the dqs package on SuSE Linux distributions.
To workaround the problem, do "chmod -s /usr/bin/dsh" and change the
files /etc/permissions* to reflect the change. If you do not need the
dqs package, then deinstall it (rpm -e dqs). We are working on update
packages that fix the problem.
- samba
Insecure temporary file handling is the cause for a new samba version
2.0.9 that can be found as rpm packages in the n1/ directory of your
distribution. It is recommended to install the update package if your
users have local shell access to your samba server (this bug is not
remotely exploitable).
We are currently investigating some oddity in the behaviour of the
samba package and will send a security announcement as soon as we
have clarified the problems. The problems were present in earlier
releases/versions of the samba package as well. By consequence, the
installation of the update package is of low risk for the functionality
of your system.
______________________________________________________________________________
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 securityat_private),
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 --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 uninstalled 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 "buildat_private" upon installation or upgrade, provided that
the package gpg is installed. The file containing the public key
is placed at the toplevel 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-securityat_private
- general/linux/SuSE security discussion.
All SuSE security announcements are sent to this list.
To subscribe, send an email to
<suse-security-subscribeat_private>.
suse-security-announceat_private
- SuSE's announce-only mailing list.
Only SuSE's security annoucements are sent to this list.
To subscribe, send an email to
<suse-security-announce-subscribeat_private>.
For general information or the frequently asked questions (faq)
send mail to:
<suse-security-infoat_private> or
<suse-security-faqat_private> respectively.
===================================================
SuSE's security contact is <securityat_private>.
The <securityat_private> public key is listed below.
===================================================
Regards,
Roman Drahtmueller <drahtat_private>.
- -
| Roman Drahtmüller <drahtat_private> // "The best way to pay for a |
SuSE GmbH - Security Phone: // lovely moment is to enjoy it."
| Nürnberg, Germany +49-911-740530 // - Richard Bach |
- -
______________________________________________________________________________
The information in this advisory may be distributed or reproduced,
provided that the advisory is not modified in any way.
SuSE GmbH 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 <securityat_private>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <buildat_private>
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This archive was generated by hypermail 2b30 : Mon Jun 04 2001 - 08:56:24 PDT