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______________________________________________________________________________
SuSE Security Announcement
Package: ypserv prior 1.3.9
Date: Tue Sep 28 08:38:50 CEST 1999
Affected: all linux distributions using the ypserv package
______________________________________________________________________________
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 that we provide this information on "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
The package ypserv is the former "yellow pages", now called NIS
information service, which is used for e.g. central network user account
management.
Several vulnerability exists: ypserv prior 1.3.9 allows an administrator
in the NIS domain to inject password tables; rpc.yppasswd prior 1.3.6.92
has got a buffer overflow in the md5 hash generation [SuSE linux is
unaffected by this, other linux falvors are]; rpc.yppasswdd prior 1.3.9
allows users to change GECO and login shell values of other users.
2. Impact
If administrator access to one server in the NIS domain is compromised,
access to the whole domain can be achieved.
On some linux distributions other than SuSE, The rpc.yppasswdd service
may halt unexpectedly. It is theoretically possible to execute arbitary
code on these systems too.
User information can be changed and restricted accounts opened.
3. Solution
Updated the package from our FTP server.
______________________________________________________________________________
Here are the md5 checksums of the upgrade packages, please verify these
before installing the new packages:
abe34d8d1831550059b3fad160fe41f5 ypserv-1.3.9-0.i386.rpm (6.1)
6937d10896d2b5beb18471491ca57781 ypserv-1.3.9-0.alpha.rpm (AXP)
19472f128099cb1e311f2db247acd39f ypserv-1.3.9-0.i386.rpm (6.2)
For SuSE 6.0 users: please use the 6.1 version.
______________________________________________________________________________
You will find the update on our ftp-Server:
ftp://ftp.suse.com/pub/suse/i386/update/6.1/n1/ypserv-1.3.9-0.i386.rpm
ftp://ftp.suse.com/pub/suse/axp/update/6.1/n1/ypserv-1.3.9-0.alpha.rpm
ftp://ftp.suse.com/pub/suse/i386/update/6.2/n1/ypserv-1.3.9-0.i386.rpm
Webpage for patches:
http://www.suse.de/patches/index.html
or try the following web pages for a list of mirrors:
http://www.suse.de/ftp.html
http://www.suse.com/ftp_new.html
______________________________________________________________________________
SuSE has got two free security mailing list services to which any
interested party may subscribe:
suse-securityat_private - moderated and for general/linux/SuSE
security discussions. All SuSE security
announcements are send to this list.
suse-security-announceat_private - 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-subscribeat_private>
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<suse-security-unsubscribeat_private>
Send mail to the following for info and FAQ for this list:
<suse-security-infoat_private>
<suse-security-faqat_private>
_____________________________________________________________________________
If you want to report *NEW* security bugs in the SuSE Linux Distribution
please send an email to securityat_private or call our support line.
You may use pgp with the public key below to ensure confidentiality.
______________________________________________________________________________
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 <securityat_private>
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