SUSE Security Announcement: (SUSE-SA:2011:035)
Posted on: 08/23/2011 04:36 PM

Updated glibc, pam-modules,l ibxcrypt, and pwdutils are available for openSUSE and SUSE Linux Enterprise


______________________________________________________________________________

SUSE Security Announcement

Package: glibc,pam-modules,libxcrypt,pwdutils
Announcement ID: SUSE-SA:2011:035
Date: Tue, 23 Aug 2011 13:00:00 +0000
Affected Products: openSUSE 11.3
openSUSE 11.4
SUSE SLES 9
Open Enterprise Server
Novell Linux POS 9
SLE SDK 10 SP3
SUSE Linux Enterprise Server 10 SP3
SUSE Linux Enterprise Software Development Kit 11 SP1
SUSE Linux Enterprise Desktop 11 SP1
SUSE Linux Enterprise Server 11 SP1
SUSE Linux Enterprise Desktop 10 SP4
SLE SDK 10 SP4
SUSE Linux Enterprise Server 10 SP4
Vulnerability Type: weak password hashing algorithm
CVSS v2 Base Score: 5.1 (AV:N/AC:H/Au:N/C:P/I:P/A:P)
SUSE Default Package: yes
Cross-References: CVE-2011-2483

Content of This Advisory:
1) Security Vulnerability Resolved:
glibc security update
Problem Description
2) Solution or Work-Around
3) Special Instructions and Notes
4) Package Location and Checksums
5) Pending Vulnerabilities, Solutions, and Work-Arounds:
none
6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

The implementation of the blowfish based password hashing method had
a bug affecting passwords that contain 8bit characters (e.g.
umlauts). Affected passwords are potentially faster to crack via
brute force methods (CVE-2011-2483).

SUSE's crypt() implementation supports the blowfish password hashing
function (id $2a) and system logins by default also use this method.
This update eliminates the bug in the $2a implementation. After
installing the update existing $2a hashes therefore no longer match
hashes generated with the new, correct implementation if the
password contains 8bit characters. For system logins via PAM the
pam_unix2 module activates a compat mode and keeps processing
existing $2a hashes with the old algorithm. This ensures no user
gets locked out. New password hashes are created with the id "$2y"
to unambiguously identify them as generated with the correct
implementation.

Services that do not use PAM but do use crypt() to store passwords
using the blowfish hash do not have such a compat mode. That means
users with 8bit passwords that use such services will not be able to
log in anymore after the update. As workaround administrators may
edit the service's password database and change stored hashes from
$2a to $2x. This will result in crypt() using the old algorithm.
Users should be required to change their passwords to make sure they
are migrated to the correct algorithm.

FAQ:

Q: I only use ASCII characters in passwords, am I a affected in any
way?
A: No.

Q: What's the meaning of the ids before and after the update?
A: Before the update:
$2a -> buggy algorithm

After the update:
$2x -> buggy algorithm
$2a -> correct algorithm
$2y -> correct algorithm

System logins using PAM have a compat mode enabled by default:
$2x -> buggy algorithm
$2a -> buggy algorithm
$2y -> correct algorithm

Q: How do I require users to change their password on next login?
A: Run the following command as root for each user:
chage -d 0

Q: I run an application that has $2a hashes in it's password database. Some
users complain that they can not log in anymore.
A: Edit the password database and change the "$2a" prefix of the affected users'
hashes to "$2x". They will be able to log in again but should change their
password ASAP.

Q: How do I turn off the compat mode for system logins?
A: Set BLOWFISH_2a2x=no in /etc/default/passwd

2) Solution or Work-Around

There is no known workaround, please install the update packages.

3) Special Instructions and Notes

To actually migrate hashes to the new algorithm all users with
8bit characters in passwords must change passwords after the
update.

4) Package Location and Checksums

The preferred method for installing security updates is to use the YaST
"Online Update" module or the "zypper" commandline tool. The package and
patch management stack will detect which updates are required and
automatically perform the necessary steps to verify and install them.

Alternatively, download the update packages for your distribution manually
and verify their integrity by the methods listed in Section 6 of this
announcement. Then install the packages using the command

rpm -Fhv

to apply the update, replacing with the filename of the
downloaded RPM package.


x86 Platform:

openSUSE 11.4:
http://download.opensuse.org/update/11.4/rpm/i586/glibc-2.11.3-12.17.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/glibc-devel-2.11.3-12.17.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/glibc-html-2.11.3-12.17.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/glibc-i18ndata-2.11.3-12.17.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/glibc-info-2.11.3-12.17.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/glibc-locale-2.11.3-12.17.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/glibc-obsolete-2.11.3-12.17.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/glibc-profile-2.11.3-12.17.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/libxcrypt-3.0.3-9.10.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/libxcrypt-devel-3.0.3-9.10.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/nscd-2.11.3-12.17.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/pam-modules-11.4-3.4.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/pwdutils-3.2.14-4.5.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/pwdutils-plugin-audit-3.2.14-4.5.1.i586.rpm
http://download.opensuse.org/update/11.4/rpm/i586/pwdutils-rpasswd-3.2.14-4.5.1.i586.rpm

openSUSE 11.3:
http://download.opensuse.org/update/11.3/rpm/i586/glibc-2.11.2-3.5.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/glibc-devel-2.11.2-3.5.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/glibc-html-2.11.2-3.5.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/glibc-i18ndata-2.11.2-3.5.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/glibc-info-2.11.2-3.5.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/glibc-locale-2.11.2-3.5.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/glibc-obsolete-2.11.2-3.5.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/glibc-profile-2.11.2-3.5.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/libxcrypt-3.0.3-5.3.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/libxcrypt-devel-3.0.3-5.3.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/nscd-2.11.2-3.5.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/pam-modules-11.3-0.3.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/pwdutils-3.2.10-2.3.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/pwdutils-plugin-audit-3.2.10-2.3.1.i586.rpm
http://download.opensuse.org/update/11.3/rpm/i586/pwdutils-rpasswd-3.2.10-2.3.1.i586.rpm

x86 Platform:

openSUSE 11.4:
http://download.opensuse.org/update/11.4/rpm/i686/glibc-2.11.3-12.17.1.i686.rpm
http://download.opensuse.org/update/11.4/rpm/i686/glibc-devel-2.11.3-12.17.1.i686.rpm

openSUSE 11.3:
http://download.opensuse.org/update/11.3/rpm/i686/glibc-2.11.2-3.5.1.i686.rpm
http://download.opensuse.org/update/11.3/rpm/i686/glibc-devel-2.11.2-3.5.1.i686.rpm

x86-64 Platform:

openSUSE 11.4:
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-32bit-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-devel-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-devel-32bit-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-html-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-i18ndata-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-info-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-locale-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-locale-32bit-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-obsolete-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-profile-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/glibc-profile-32bit-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/libxcrypt-3.0.3-9.10.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/libxcrypt-32bit-3.0.3-9.10.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/libxcrypt-devel-3.0.3-9.10.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/nscd-2.11.3-12.17.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/pam-modules-11.4-3.4.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/pam-modules-32bit-11.4-3.4.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/pwdutils-3.2.14-4.5.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/pwdutils-plugin-audit-3.2.14-4.5.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/pwdutils-rpasswd-3.2.14-4.5.1.x86_64.rpm
http://download.opensuse.org/update/11.4/rpm/x86_64/pwdutils-rpasswd-32bit-3.2.14-4.5.1.x86_64.rpm

openSUSE 11.3:
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-32bit-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-devel-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-devel-32bit-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-html-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-i18ndata-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-info-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-locale-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-locale-32bit-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-obsolete-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-profile-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/glibc-profile-32bit-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/libxcrypt-3.0.3-5.3.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/libxcrypt-32bit-3.0.3-5.3.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/libxcrypt-devel-3.0.3-5.3.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/nscd-2.11.2-3.5.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/pam-modules-11.3-0.3.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/pam-modules-32bit-11.3-0.3.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/pwdutils-3.2.10-2.3.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/pwdutils-plugin-audit-3.2.10-2.3.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/pwdutils-rpasswd-3.2.10-2.3.1.x86_64.rpm
http://download.opensuse.org/update/11.3/rpm/x86_64/pwdutils-rpasswd-32bit-3.2.10-2.3.1.x86_64.rpm

Sources:

openSUSE 11.4:
http://download.opensuse.org/update/11.4/rpm/src/glibc-2.11.3-12.17.1.nosrc.rpm
http://download.opensuse.org/update/11.4/rpm/src/glibc-2.11.3-12.17.1.src.rpm
http://download.opensuse.org/update/11.4/rpm/src/libxcrypt-3.0.3-9.10.1.src.rpm
http://download.opensuse.org/update/11.4/rpm/src/pam-modules-11.4-3.4.1.src.rpm
http://download.opensuse.org/update/11.4/rpm/src/pwdutils-3.2.14-4.5.1.src.rpm

openSUSE 11.3:
http://download.opensuse.org/update/11.3/rpm/src/glibc-2.11.2-3.5.1.nosrc.rpm
http://download.opensuse.org/update/11.3/rpm/src/glibc-2.11.2-3.5.1.src.rpm
http://download.opensuse.org/update/11.3/rpm/src/libxcrypt-3.0.3-5.3.1.src.rpm
http://download.opensuse.org/update/11.3/rpm/src/pam-modules-11.3-0.3.1.src.rpm
http://download.opensuse.org/update/11.3/rpm/src/pwdutils-3.2.10-2.3.1.src.rpm

Our maintenance customers are notified individually. The packages are
offered for installation from the maintenance web:

SUSE Linux Enterprise Server 10 SP4
http://download.novell.com/patch/finder/?keywords=8e9ceee14766a579acb89753eac6018f

SLE SDK 10 SP4
http://download.novell.com/patch/finder/?keywords=8e9ceee14766a579acb89753eac6018f

SUSE Linux Enterprise Desktop 10 SP4
http://download.novell.com/patch/finder/?keywords=8e9ceee14766a579acb89753eac6018f

SLE SDK 10 SP3
http://download.novell.com/patch/finder/?keywords=953879412f2611d0c50fcaee712c9779

SUSE Linux Enterprise Server 10 SP3
http://download.novell.com/patch/finder/?keywords=953879412f2611d0c50fcaee712c9779

SUSE Linux Enterprise Server 11 SP1
http://download.novell.com/patch/finder/?keywords=77013a29c4a8ec72e720b000b88f4b70

SUSE Linux Enterprise Desktop 11 SP1
http://download.novell.com/patch/finder/?keywords=77013a29c4a8ec72e720b000b88f4b70

SUSE Linux Enterprise Software Development Kit 11 SP1
http://download.novell.com/patch/finder/?keywords=77013a29c4a8ec72e720b000b88f4b70

Open Enterprise Server
http://download.novell.com/patch/finder/?keywords=9461d1e81594a5e74d3886c3bbeb79ba

Novell Linux POS 9
http://download.novell.com/patch/finder/?keywords=9461d1e81594a5e74d3886c3bbeb79ba

SUSE SLES 9
http://download.novell.com/patch/finder/?keywords=9461d1e81594a5e74d3886c3bbeb79ba

______________________________________________________________________________

5) Pending Vulnerabilities, Solutions, and Work-Arounds:

none
______________________________________________________________________________

6) Authenticity Verification and Additional Information

- Announcement authenticity verification:

SUSE security announcements are published via mailing lists and on Web
sites. The authenticity and integrity of a SUSE security announcement is
guaranteed by a cryptographic signature in each announcement. All SUSE
security announcements are published with a valid signature.

To verify the signature of the announcement, save it as text into a file
and run the command

gpg --verify

replacing with the name of the file where you saved the
announcement. The output for a valid signature looks like:

gpg: Signature made using RSA key ID 3D25D3D9
gpg: Good signature from "SuSE Security Team "

where is replaced by the date the document was signed.

If the security team's key is not contained in your key ring, you can
import it from the first installation CD. To import the key, use the
command

gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc

- Package authenticity verification:

SUSE update packages are available on many mirror FTP servers all over the
world. While this service is considered valuable and important to the free
and open source software community, the authenticity and the integrity of
a package needs to be verified to ensure that it has not been tampered
with.

The internal 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, replacing with the
filename of the RPM package downloaded. The package is unmodified if it
contains a valid signature from build@suse.de with the key ID 9C800ACA.

This key is automatically imported into the RPM database (on
RPMv4-based distributions) and the gpg key ring of 'root' during
installation. You can also find it on the first installation CD and at
the end of this announcement.

- SUSE runs two security mailing lists to which any interested party may
subscribe:

opensuse-security@opensuse.org
- General Linux and SUSE security discussion.
All SUSE security announcements are sent to this list.
To subscribe, send an e-mail to
.

opensuse-security-announce@opensuse.org
- SUSE's announce-only mailing list.
Only SUSE's security announcements are sent to this list.
To subscribe, send an e-mail to
.



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