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SuSE Security Announcement – ypserv


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