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[HP] Update zur Schwachstelle in pcltotiff - HPSBUX0104-149 (rev.01)



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Liebe Kolleginnen und Kollegen,

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

Das Update besteht in detailierteren Informationen zur Einpassung der
Aenderungen des Workarounds in swverify.

Zur Erinnerung noch einmal die Beschreibung der Schwachstelle:

Aufgrund einer Schwachstelle im Programm pcltotiff ist lokalen
Angreifern ein (nicht naeher spezifizierter) Denial-of-Service Angriff 
moeglich.

Betroffen von der Schwachstelle sind HP-UX 10.01, 10.10, 10.20 und
10.26. Ein offizieller Patch ist zur Zeit noch nicht verfuegbar. Der
im Advisory beschriebene Workaround eleminiert jedoch das Problem ohne
Einbussen an Sicherheit und Funktionalitaet. HP empfehlt, das SetGID
Bit auf /opt/sharedprint/bin/pcltotiff zu entfernen und die Dateien im
Verzeichnis /usr/lib/X11/fonts/ifo.st/typefaces fuer alle Nutzer
lesbar zu machen. Weitere Details entnehmen Sie bitte dem angefuegten
Advisory.

Wie ueblich, ist das Advisory von HP nicht digital signiert.

Mit freundlichen Gruessen,
                Klaus Moeller, DFN-CERT

- --
Klaus Moeller          |                      mailto:moeller@xxxxxxxxxxx
DFN-CERT GmbH          |            http://www.cert.dfn.de/team/moeller/
Oberstrasse 14b        |                        Phone: +49(40)808077-555
D-20144 Hamburg        |                          FAX: +49(40)808077-556
Germany                |         PGP-Key: finger moeller@xxxxxxxxxxxxxxx

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Digest Name:  daily security bulletins digest
    Created:  Fri Apr 27  3:00:02 PDT 2001

Table of Contents:

Document ID      Title
- ---------------  -----------
HPSBUX0104-149   Sec. Vulnerability in pcltotiff (rev.01)

The documents are listed below.
- -------------------------------------------------------------------------------


Document ID:  HPSBUX0104-149
Date Loaded:  20010426
      Title:  Sec. Vulnerability in pcltotiff (rev.01)

- -------------------------------------------------------------------------
**REVISED01**HEWLETT-PACKARD COMPANY SECURITY ADVISORY #0149, 19 April '01
Last revised: 26 April 2001
- -------------------------------------------------------------------------

The information in the following Security Advisory should be acted upon
as soon as possible.  Hewlett-Packard Company will not be liable for any
consequences to any customer resulting from customer's failure to fully
implement instructions in this Security Advisory as soon as possible.

- -------------------------------------------------------------------------
PROBLEM:   /opt/sharedprint/bin/pcltotiff has unsafe permissions.

PLATFORM:  HP9000 Series 700/800 running HP-UX releases 10.01,
           10.10, 10.20, and 10.26.

DAMAGE:    Denial of service.

SOLUTION:  Change the permissions on /opt/sharedprint/bin/pcltotiff.

AVAILABILITY:  A bulletin will be issued when patches are available.
CHANGE SUMMARY: Typographical error corrections in script.
- -------------------------------------------------------------------------
I.
   A. Background

      /opt/sharedprint/bin/pcltotiff is in group bin with set group id
      permissions.  This is necessary to allow pcltotiff to read files
      in /usr/lib/X11/fonts/ifo.st/typefaces/.

   B. Fixing the problem

      Remove the set group id permissions from pcltotiff and
      allow read access to /usr/lib/X11/fonts/ifo.st/typefaces/.

   C. Recommended solution

      /sbin/chmod 555 /opt/sharedprint/bin/pcltotiff
      /sbin/chmod o+r /usr/lib/X11/fonts/ifo.st/typefaces/*

      To avoid swverify errors:
**REVISED 01:
      #!/sbin/sh
      /usr/sbin/swmodify -x files='/opt/sharedprint/bin/pcltotiff' \
        SharedPrint.SHPRNT-PCL

       for i in `/sbin/ls /usr/lib/X11/fonts/ifo.st/typefaces`
       do
        /usr/sbin/swmodify \
          -x files="/usr/lib/X11/fonts/ifo.st/typefaces/$i" \
          X11.X11-FONTSRV
      done
**END REVISION 01

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________________________________________________________________________
- -----End of Document ID:  HPSBUX0104-149--------------------------------------

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