Mailinglist Archive: opensuse-security-announce (6 mails)

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SuSE Security Announcement - aaa_base
  • From: marc@xxxxxxx (Marc Heuse)
  • Date: Sat Apr 29 14:28:06 2000
  • Message-id: <20000429142806.EB73467B0@xxxxxxxxxxxxxx>




-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

                        SuSE Security Announcement

        Package: aaabase < 2000.1.3
        Date:    Sat, 29 Apr 2000 14:03:28 GMT

        Affected SuSE versions: all
        Vulnerability Type:     remove any local file(s)
                                executing attacker supplied commands as non-root
        SuSE default package:   yes
        Other affected systems: unknown
______________________________________________________________________________

A security hole was discovered in the package mentioned above.
Please update as soon as possible or disable the service if you are using
this software on your SuSE Linux installation(s).

Other Linux distributions or operating systems might be affected as
well, please contact your vendor for information about this issue.

Please note that we provide this information on an "as-is" basis only.
There is no warranty whatsoever and no liability for any direct, indirect or
incidental damage arising from this information or the installation of
the update package.
_____________________________________________________________________________

1. Problem Description

  aaa_base is the basic package which comes with any SuSE Linux installation.
  Two vulnerabilities have been found:

  1) The cron job /etc/cron.daily/aaa_base does a daily checking of files in
  /tmp and /var/tmp, where old files will be deleted if configured to do so.
  Please note this this feature is NOT activated by default

  2) Some system accounts have their homedirectories set to /tmp by default.
  These are the users games, firewall, wwwrun and nobody on a SuSE 6.4.

2. Impact

  1) If the /tmp cleanup is activated, any file or directory can be deleted
  by any local user

  2) If an attacker creates dot files in /tmp (e.g. bash profiles), these
  might be executed if someone uses e.g. "su - nobody" to switch to the
  nobody user. This can lead to a compromise of that userid.
  This vulnerability is present in several other unix systems as well -
  please check all!

3. Solution

  1) Update the package from our FTP server.

  2) The root user will receive a email with the accounts listed which have
  a homedirectory in /tmp. You have to fix this by hand, because some
  installations might break if they rely on information saved in the (unsafe)
  /tmp homedirectory.
  The email will give more information what to do.
______________________________________________________________________________

Please verify these md5 checksums of the updates before installing:

369c48687807875e9b01f24b6e6bb061  ftp://ftp.suse.com/pub/suse/axp/update/6.3/a1/aaa_base-2000.1.3-0.alpha.rpm
350cabc140a177dfa1909d356c982647  ftp://ftp.suse.com/pub/suse/i386/update/6.2/a1/aaa_base-99.9.8-0.i386.rpm
1b0ccf6db229d6c45692588d826853b7  ftp://ftp.suse.com/pub/suse/i386/update/6.3/a1/aaa_base-2000.1.3-0.i386.rpm
34ff11f9ffd877231fab6add4a1723dd  ftp://ftp.suse.com/pub/suse/i386/update/6.4/a1/aaa_base-2000.4.27-1.i386.rpm                                                  ;
______________________________________________________________________________

You can find updates on our ftp-Server:

  ftp://ftp.suse.com/pub/suse/i386/update for Intel processors
  ftp://ftp.suse.com/pub/suse/axp/update  for Alpha processors

or try the following web pages for a list of mirrors:
  http://www.suse.de/ftp.html
  http://www.suse.com/ftp_new.html

Our webpage for patches:
  http://www.suse.de/patches/index.html

Our webpage for security announcements:
  http://www.suse.de/security

If you want to report vulnerabilities, please contact
  security@xxxxxxx
______________________________________________________________________________

SuSE has got two free security mailing list services to which any
interested party may subscribe:

use-security@xxxxxxxx          - moderated and for general/linux/SuSE
                                  security discussions. All SuSE security
                                  announcements are sent to this list.

use-security-announce@xxxxxxxx - SuSE's announce-only mailing list.
                                  Only SuSE's security annoucements are sent
                                  to this list.

To subscribe to the list, send a message to:
     <suse-security-subscribe@xxxxxxxx>

To remove your address from the list, send a message to:
     <suse-security-unsubscribe@xxxxxxxx>

Send mail to the following for info and FAQ for this list:
     <suse-security-info@xxxxxxxx>
     <suse-security-faq@xxxxxxxx>

_____________________________________________________________________________

  This information is provided freely to everyone interested and may
  be redistributed provided that it is not altered in any way.

Type Bits/KeyID    Date       User ID
pub  2048/3D25D3D9 1999/03/06 SuSE Security Team <security@xxxxxxx>

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