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Home » Hacking News » SuSE SA:2003:024: OpenSSL multiple vulnerabilities

SuSE SA:2003:024: OpenSSL multiple vulnerabilities

by Nikola Strahija on April 6th, 2003 Several vulnerabilities have been discovered in OpenSSL which may allow remote attackers to calculate the private RSA key of the server.


-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

SuSE Security Announcement

Package: openssl
Announcement-ID: SuSE-SA:2003:024
Date: Fri Apr 4 14:00:00 MEST 2003
Affected products: 7.1, 7.2, 7.3, 8.0, 8.1
SuSE Linux Database Server
SuSE eMail Server III, 3.1
SuSE Firewall Adminhost VPN
SuSE Linux Admin-CD for Firewall
SuSE Firewall on CD 2 - VPN
SuSE Firewall on CD 2
SuSE Linux Live-CD for Firewall
SuSE Linux Connectivity Server
SuSE Linux Enterprise Server 7
SuSE Linux Enterprise Server 8
SuSE Linux Office Server
UnitedLinux 1.0
Vulnerability Type: remote private-key retrieval
Severity (1-10): 5
SuSE default package: Yes
Cross References: http://www.openssl.org

Content of this advisory:
1) security vulnerability resolved: Remote timing attack and
"Klima-Pokorny-Rosa" attack.
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- glibc
- vnc
3) standard appendix (further information)

______________________________________________________________________________

1) problem description, brief discussion, solution, upgrade information

Researchers from the University of Stanford have discovered certain
weaknesses in OpenSSL's RSA decryption algorithm. It allows remote
attackers to compute the private RSA key of a server by observing
its timing behavior. This bug has been fixed by enabling "RSA blinding",
by default.
Additionally an extension of the "Bleichenbacher attack" has been
developed by Czech researchers against OpenSSL. This weakness has
also been fixed.


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.

i386 Intel Platform:

SuSE-8.2:
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/openssl-0.9.6i-12.i586.rpm
b418a2f73ab572f99f156335f3cd4ef4
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/openssl-devel-0.9.6i-12.i586.rpm
d0539c626612c5fcd9b1e81e529dc3af
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/openssl-0.9.6i-12.i586.patch.rpm
3c8a296170b34838db459a5aefc3e104
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/openssl-devel-0.9.6i-12.i586.patch.rpm
8978902dde74da69f72c4ff93a90f1eb
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/openssl-0.9.6i-12.src.rpm
6dfaa0788bcdcb99939890d4bbd62826

SuSE-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-0.9.6g-68.i586.rpm
2ecce759f2806b5ab475877b0ccd1f6f
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-devel-0.9.6g-68.i586.rpm
aa79f7f72e503393f8fa9c34290ab497
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-0.9.6g-68.i586.patch.rpm
68e33f6f3f90234a599e7473262e4924
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-devel-0.9.6g-68.i586.patch.rpm
07ee91826db414421ad2a5a1abe27191
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/openssl-0.9.6g-68.src.rpm
177ff751ecf0e5e191b36e9df28479ee

SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/sec1/openssl-0.9.6c-85.i386.rpm
fabc6f1768cb113555690dbc26b26779
ftp://ftp.suse.com/pub/suse/i386/update/8.0/d3/openssl-devel-0.9.6c-85.i386.rpm
788751185ecf5c3538378de8f583c900
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/sec1/openssl-0.9.6c-85.i386.patch.rpm
dc19ef5b07fcd32d060e8c6c0f11d3e1
ftp://ftp.suse.com/pub/suse/i386/update/8.0/d3/openssl-devel-0.9.6c-85.i386.patch.rpm
0152c98bab2617456b7250431f37c41e
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/openssl-0.9.6c-85.src.rpm
66080ca41e143339ef95d7dd0c4c19fe

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/sec1/openssl-0.9.6b-156.i386.rpm
7da5bae86380a034312d69e745bb1bb5
ftp://ftp.suse.com/pub/suse/i386/update/7.3/d2/openssl-devel-0.9.6b-156.i386.rpm
d54d7948b2a5cce732971890f51520a3
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/openssl-0.9.6b-156.src.rpm
13749156d3a6fd7597407a65bf2c527b

SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/sec1/openssl-0.9.6a-82.i386.rpm
105d9266ea2117bfa9643eb66441f39b
ftp://ftp.suse.com/pub/suse/i386/update/7.2/d2/openssl-devel-0.9.6a-82.i386.rpm
5d607333a4ddae3cb1e303a8afaf2f43
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/openssl-0.9.6a-82.src.rpm
7a06275dda66ea2e9da6c76425439369

SuSE-7.1:
ftp://ftp.suse.com/pub/suse/i386/update/7.1/sec1/openssl-0.9.6a-81.i386.rpm
8bb8ea69f878aa08331269bf3f38afa2
ftp://ftp.suse.com/pub/suse/i386/update/7.1/d2/openssl-devel-0.9.6a-81.i386.rpm
dede7c66740ab249de577e5699e8639f
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/openssl-0.9.6a-81.src.rpm
07bc8370887abba6db3ace2d523eeade


Sparc Platform:

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/sec1/openssl-0.9.6b-89.sparc.rpm
1391d007fdb5b99fd71aba949aeb0310
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/d2/openssl-devel-0.9.6b-89.sparc.rpm
9f0ff708c016fd62d103cadbf3f6892e
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/openssl-0.9.6b-89.src.rpm
fac800ccac7c5f2c3eb544f5a7bf0aea


AXP Alpha Platform:

SuSE-7.1:
ftp://ftp.suse.com/pub/suse/axp/update/7.1/sec1/openssl-0.9.6a-31.alpha.rpm
c8d02c071cee8f6d70d8a9bb26b010f2
ftp://ftp.suse.com/pub/suse/axp/update/7.1/d2/openssl-devel-0.9.6a-31.alpha.rpm
13cdfd1f3b35ee90a7d09240a2a3df40
source rpm(s):
ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/openssl-0.9.6a-31.src.rpm
e64213b7b488d16de6152d94db9aaa99


PPC Power PC Platform:

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/sec1/openssl-0.9.6b-150.ppc.rpm
cb2b6467cbad88c2ac4cecd889b2cb40
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/d2/openssl-devel-0.9.6b-150.ppc.rpm
c11a579a40184ad6a108bfaa787b2038
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/openssl-0.9.6b-150.src.rpm
889ea0f28304224329a37d12390e370b

SuSE-7.1:
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/sec1/openssl-0.9.6a-31.ppc.rpm
1694ef2f2018cfcdd4a4bab97d21978b
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/d2/openssl-devel-0.9.6a-31.ppc.rpm
f1b6838c46f3775d4ee6c51714247cb1
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/openssl-0.9.6a-31.src.rpm
5a8af3aa4592efba1194518b9a50253e


______________________________________________________________________________

2) Pending vulnerabilities in SuSE Distributions and Workarounds:

- glibc
New glibc packages will be available soon which fix a RPC XDR integer
overflow. The packages are currently being tested.

- vnc
VNC (Virtual Network Computing) uses a weak cookie generation process
which can be exploited by an attacker to bypass authentication.
New packages are currently being tested and will be available on our
FTP servers soon.

______________________________________________________________________________

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
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 [email protected]),
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 "[email protected]" 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:

[email protected]
- general/linux/SuSE security discussion.
All SuSE security announcements are sent to this list.
To subscribe, send an email to
.

[email protected]
- 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 .
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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