Date: 24 Oct 1999 18:34:23 +0200
From: “Marc Heuse” marc@suse.de
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