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[HP-UX] Mehre Schwachstellen in Samba vor Version 3.0.25 - HPSBTU02233 - SSRT071424



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Liebe Kolleginnen und Kollegen,

soeben erreichte uns das nachfolgende Bulletin der HP SupportLine. Wir
geben diese Informationen unveraendert an Sie weiter.

CVE-2007-2444 - Fehler im Samba Server bei der Bearbeitung von SIDs

  Im Samba Server existiert ein logischer Fehler bei der Zuordnung von
  SIDs (Security Identifiers) zu der lokalen Samba Liste von User- und
  Gruppenaccounts. Ein lokaler Angreifer kann diese Schwachstelle
  ausnutzen, um beliebige Operationen im SMB/CIFS Protokoll mit
  root-Rechten auszufuehren. Dies kann dem Angreifer eine
  Kompromittierung des root-Accounts ermoeglichen.

CVE-2007-2446 - Heap Overflow Schwachstellen im Samba Server

  An mehreren Stellen kann es beim Parsen von NDR-Datenstrukturen
  (Network Data Representation) in MS-RPC Funktionsaufrufen zu Buffer
  Overflows im Heap Segment kommen. Ein entfernter Angreifer kann diese
  Schwachstellen ausnutzen, um beliebige Kommandos mit den Rechten des
  Samba Servers auszufuehren.

CVE-2007-2447 - Schwachstelle in der Samba Funktion SamrChangePassword

  In der Samba MS-RPC Funktion SamrChangePassword werden
  Shell-Sonderzeichen nicht ausreichend gefiltert, wenn ein Kommando
  ueber eine Shell aufgerufen wird. Ein entfernter Angreifer kann diese
  Schwachstelle mittels eines speziell konstruierten SamrChangePassword
  Aufrufs ausnutzen, um beliebige Kommandos mit den Rechten des Accounts
  nobody auszufuehren. Um die Schwachstelle ausnutzen zu koennen, ist
  kein gueltiger Samba Benutzeraccount notwendig. Allerdings muss die
  Option "username map script" in der Samba Konfiguration aktiviert
  sein, damit die Schwachstelle ausgenutzt werden kann.

  Andere Samba Funktionen uebergeben ebenfalls Parameter in
  Shell-Aufrufen ohne Filterung von Shell-Metazeichen und beinhalten
  deshalb aehnliche Schwachstellen. Diese Funktionen sind allerdings nur
  von authentifizierten Samba Benutzern aufrufbar.

Betroffen sind die folgenden Software Pakete und Plattformen:

  Samba v 3.0.23

  Tru64 UNIX (IX) v 6.6

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

Hersteller Advisory:
  http://www5.itrc.hp.com/service/cki/docDisplay.do?docId=c01091459


(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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SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c01091459
Version: 1

HPSBTU02233 SSRT071424 rev.1 - HP Tru64 UNIX Internet Express running Samba, Remote Arbitrary Code Execution or Local Unauthorized Privilege Elevation

NOTICE: The information in this Security Bulletin should be acted upon as soon as possible.

Release Date: 2007-06-27
Last Updated: 2007-06-27


Potential Security Impact: Remote Arbitrary Code Execution or Local Unauthorized Privilege Elevation

Source: Hewlett-Packard Company, HP Software Security Response Team

VULNERABILITY SUMMARY
Potential vulnerabilities have been identified with Samba provided with HP Internet Express for Tru64 UNIX (IX) v 6.6. The potential vulnerabilities could be exploited by a remote, unauthenticated user to execute arbitrary commands or by a local, unauthorized user to gain privilege elevation. 

References: CVE-2007-2444, CVE-2007-2446, CVE-2007-2447

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
The following supported software versions are affected: 

HP Internet Express for Tru64 UNIX (IX) v 6.6 running Samba v 3.0.23

BACKGROUND
 

RESOLUTION
Until the update is available in the mainstream product release, HP is releasing the following setld-based Samba kit publicly for use by any customer. 

The resolutions contained in the Samba kit are targeted for availability in the following mainstream product release:

HP Internet Express for Tru64 UNIX v 6.7

The kit distributes the following:

Samba v 3.0.25 
Samba sources and license agreement 

HP Internet Express for Tru64 UNIX - Samba 3.0.25 
Prerequisite: HP Internet Express for Tru64 UNIX v 6.6 
Name: IX66-SAMBA-20070528.tar.gz 
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?patchid=IX66-SAMBA-20070530  

PRODUCT SPECIFIC INFORMATION 

HISTORY 
Version:1 (rev.1) - 27 June 2007 Initial release. This is a replacement for Security Bulletin HPSBTU02218 (Document ID: c01078980) that is otherwise identical in order to avoid a possible identification conflict with a different Security Bulletin.

Third Party Security Patches: Third party security patches which are to be installed on systems running HP software products should be applied in accordance with the customer's patch management policy. 

Support: For further information, contact normal HP Services support channel.

Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@xxxxxx 
It is strongly recommended that security related information being communicated to HP be encrypted using PGP, especially exploit information. 
To get the security-alert PGP key, please send an e-mail message as follows:
  To: security-alert@xxxxxx 
  Subject: get key
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On the web page: ITRC security bulletins and patch sign-up 
Under Step1: your ITRC security bulletins and patches 
  - check ALL categories for which alerts are required and continue.
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To review previously published Security Bulletins visit: http://www.itrc.hp.com/service/cki/secBullArchive.do 


* The Software Product Category that this Security Bulletin relates to is represented by the 5th and 6th characters of the Bulletin number in the title: 

GN = HP General SW 
MA = HP Management Agents 
MI = Misc. 3rd Party SW 
MP = HP MPE/iX 
NS = HP NonStop Servers 
OV = HP OpenVMS 
PI = HP Printing & Imaging 
ST = HP Storage SW 
TL = HP Trusted Linux 
TU = HP Tru64 UNIX 
UX = HP-UX 
VV = HP VirtualVault 

System management and security procedures must be reviewed frequently to maintain system integrity. HP is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions.


"HP is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HP products the important security information contained in this Bulletin. HP recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HP does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HP will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HP disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement."

�Copyright 2007 Hewlett-Packard Development Company, L.P. 
Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HP or its affiliates, subcontractors or suppliers will be liable for incidental, special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of Hewlett-Packard products referenced herein are trademarks of Hewlett-Packard Company in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners. 
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- -- 
Dipl. Inform. Klaus Moeller (CSIRT)
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
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