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<p> UPDATE INFORMATION
The original announcement pointed to update rpms which were old and did
*NOT* fix the vulnerabilities.
We apologize for this mistake.
______________________________________________________________________________
SuSE Security Announcement
Package: aaabase < 2000.5.2
Date: Tue May 2 21:56:21 CEST 2000
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:
(for SuSE 6.0 please use the 6.1 update rpm)
a8204a4929c139e895f3357021647daa ftp://ftp.suse.com/pub/suse/axp/update/6.1/a1/aaa_base-2000.5.2-0.alpha.rpm
5dee42bd0f531922d0b17d859f3d0d0d ftp://ftp.suse.com/pub/suse/axp/update/6.3/a1/aaa_base-2000.5.2-0.alpha.rpm
da8c74f80983beecf23baa62eea45142 ftp://ftp.suse.com/pub/suse/i386/update/6.1/a1/aaa_base-2000.5.2-0.i386.rpm
9618ec3ae63f4d80527a8e3b5f610fc1 ftp://ftp.suse.com/pub/suse/i386/update/6.2/a1/aaa_base-2000.5.2-0.i386.rpm
db53e002b6be652b31262bf89be0c31a ftp://ftp.suse.com/pub/suse/i386/update/6.4/a1/aaa_base-2000.5.2-0.i386.rpm
488eda289876ba3c14dbffb881dc8726 ftp://ftp.suse.com/pub/suse/ppc/update/6.3/a1/aaa_base-2000.5.2-0.ppc.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@suse.de
______________________________________________________________________________
SuSE has got two free security mailing list services to which any
interested party may subscribe:
use-security@suse.com - moderated and for general/linux/SuSE
security discussions. All SuSE security
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use-security-announce@suse.com - SuSE's announce-only mailing list.
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