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Date: Fri, 27 Oct 2000 12:07:10 -0600
To: announce@lists.calderasystems.com, bugtraq@securityfocus.com,
Subject: Security Update: security problems in ypbind
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______________________________________________________________________________
Caldera Systems, Inc. Security Advisory
Subject: security problems in ypbind
Advisory number: CSSA-2000-039.0
Issue date: 2000 October, 27
Cross reference:
______________________________________________________________________________
1. Problem Description
There are several security problems in ypbind, the daemon used by
NIS clients for binding to their NIS server(s). First, there is a
potential buffer overflow; it is not clear whether it is possible
to exploit it at all. Second, there is a denial of service attack
against ypbind that can make it run out of file descriptors.
2. Vulnerable Versions
System Package
-----------------------------------------------------------
OpenLinux Desktop 2.3 All packages previous to
nis-2.0-12
OpenLinux eServer 2.3 All packages previous to
and OpenLinux eBuilder nis-2.0-12
OpenLinux eDesktop 2.4 All packages previous to
nis-2.0-12
3. Solution
Workaround:
none
4. OpenLinux Desktop 2.3
4.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.calderasystems.com/pub/updates/OpenLinux/2.3/current/RPMS/
The corresponding source code package can be found at:
ftp://ftp.calderasystems.com/pub/updates/OpenLinux/2.3/current/SRPMS
4.2 Verification
475f1173b39d61be3bfefb616adc7d70 RPMS/nis-client-2.0-12.i386.rpm
2b843e611fa135fec1d1ab3eec32eafe RPMS/nis-server-2.0-12.i386.rpm
c0fc63b43f7302da24119d8e7ac2bb7c SRPMS/nis-2.0-12.src.rpm
4.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fhv nis-*.i386.rpm
5. OpenLinux eServer 2.3 and OpenLinux eBuilder for ECential 3.0
5.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.calderasystems.com/pub/updates/eServer/2.3/current/RPMS/
The corresponding source code package can be found at:
ftp://ftp.calderasystems.com/pub/updates/eServer/2.3/current/SRPMS
5.2 Verification
dda1d3f8465c5a1e39f7274bd413c4e9 RPMS/nis-client-2.0-12.i386.rpm
2872d08157734973e37237ba10d7f87e RPMS/nis-server-2.0-12.i386.rpm
c0fc63b43f7302da24119d8e7ac2bb7c SRPMS/nis-2.0-12.src.rpm
5.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fhv nis-*.i386.rpm
6. OpenLinux eDesktop 2.4
6.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.calderasystems.com/pub/updates/eDesktop/2.4/current/RPMS/
The corresponding source code package can be found at:
ftp://ftp.calderasystems.com/pub/updates/eDesktop/2.4/current/SRPMS
6.2 Verification
41a67ed3b1508ecb959b7d72a42a7e7d RPMS/nis-client-2.0-12.i386.rpm
563902177d6abe1f446e264cbf127062 RPMS/nis-server-2.0-12.i386.rpm
c0fc63b43f7302da24119d8e7ac2bb7c SRPMS/nis-2.0-12.src.rpm
6.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fhv nis-*.i386.rpm
7. References
This and other Caldera security resources are located at:
http://www.calderasystems.com/support/security/index.html
This security fix closes Caldera's internal Problem Report 8117.
8. Disclaimer
Caldera Systems, Inc. is not responsible for the misuse of any of the
information we provide on this website and/or through our security
advisories. Our advisories are a service to our customers intended to
promote secure installation and use of Caldera OpenLinux.
______________________________________________________________________________
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