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Liebe Kolleginnen und Kollegen,
soeben erreichte uns nachfolgendes Fedora Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.
Der System Security Services Daemon (SSSD) ermoeglicht eine zentrale
Konfiguration der Authentifikationsmechanismen z.B. PAM, NSS, usw., auf
den verwalteten Client-Systemen.
CVE-2009-2410 – Schwachstelle im System Security Services Daemon
Wird in der BE Datenbank des System Security Services Daemon (SSSD)
ein interner Nutzer ohne Passwort konfiguriert, kann dieser sich auf
allen SSSD Client-Systemen per SSH durch Angabe eines beliebigen
Passworts einloggen (normalerweise sollte kein Login fuer Accounts
ohne Passwort moeglich sein).
Betroffen sind die folgenden Software Pakete und Plattformen:
Paket sssd
Fedora 11
Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.
Hersteller Advisory:
https://www.redhat.com/archives/fedora-package-announce/2009-July/msg01236.html
(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.
Mit freundlichen Gruessen,
Klaus Moeller, DFN-CERT
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Dipl. Inform. Klaus Moeller (Incident Response Team)
Phone: +49 40 808077-555, Fax: +49 40 808077-556
DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-555
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737
Sachsenstrase 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski
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Fedora Update Notification
FEDORA-2009-8101
2009-07-29 20:59:08
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Name : sssd
Product : Fedora 11
Version : 0.4.1
Release : 3.fc11
URL : http://fedorahosted.org/sssd
Summary : System Security Services Daemon
Description :
Provides a set of daemons to manage access to remote directories and
authentication mechanisms. It provides an NSS and PAM interface toward
the system and a pluggable backend system to connect to multiple different
account sources. It is also the basis to provide client auditing and policy
services for projects like FreeIPA.
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Update Information:
If a user was added to the SSSD BE database without setting a password, the user
could ssh to the SSSD configured client and enter any password to gain access.
This update resolves this issue so users with no password set are no longer able
to login.
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ChangeLog:
* Wed Jul 29 2009 Jakub Hrozek
– – Fix for CVE-2009-2410 – Native SSSD users with no password set could log in
without a password. (Patch by Stephen Gallagher)
* Mon Jun 22 2009 Simo Sorce
– – Fix a couple of segfaults that may happen on reload
* Thu Jun 11 2009 Simo Sorce
– – add missing configure check that broke stopping the daemon
– – also fix default config to add a missing required option
* Mon Jun 8 2009 Simo Sorce
– – latest upstream release.
– – also add a patch that fixes debugging output (potential segfault)
* Wed Apr 29 2009 Simo Sorce
– – Add use_first_pass option to fix pam stack problems
* Tue Apr 28 2009 Simo Sorce
– – Add patches to fix password caches when offline
* Mon Apr 27 2009 Simo Sorce
– – Version 0.3.3
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References:
[ 1 ] Bug #514057 – CVE-2009-2410 If internal sssd user has no password set, the user can ssh to the sssd client with any supplied password
https://bugzilla.redhat.com/show_bug.cgi?id=514057
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This update can be installed with the “yum” update program. Use
su -c ‘yum update sssd’ at the command line.
For more information, refer to “Managing Software with yum”,
available at http://docs.fedoraproject.org/yum/.
All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
http://fedoraproject.org/keys
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