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Caldera Systems Security Advisory: security problems in dhcp

Jan 16, 2001, 20:17 (0 Talkback[s])

Date: Mon, 15 Jan 2001 17:06:47 -0700
From: Caldera Support Info sup-info@LOCUTUS4.CALDERASYSTEMS.COM
To: BUGTRAQ@SECURITYFOCUS.COM
Subject: Caldera Systems Security Advisory


                   Caldera Systems, Inc.  Security Advisory

Subject:                security problems in dhcp
Advisory number:        CSSA-2001-003.0
Issue date:             2001 January, 12
Cross reference:

1. Problem Description

The DHCP server and client shipped as part of OpenLinux had security problems in the error logging code. An attacker can potentially overflow a static buffer, and provide a string containing formatting directives.

2. Vulnerable Versions

   System                       Package

   OpenLinux Desktop 2.3        All packages previous to
                                dhcpd-1.0pl2-4

   OpenLinux eServer 2.3.1      All packages previous to
   and OpenLinux eBuilder       dhcp2-2.0-1

   OpenLinux eDesktop 2.4       All packages previous to
                                dhcp-2.0b1pl29-2
3. Solution

Workaround:

none

The proper solution is to upgrade to the fixed packages

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

eca24327ed103c02a9799bf04a9a7094 RPMS/dhcpd-1.0pl2-4.i386.rpm
ba5d3067b4d4eca8a36d8a4c63f33ba2 SRPMS/dhcpd-1.0pl2-4.src.rpm

4.3 Installing Fixed Packages

Upgrade the affected packages with the following commands:

rpm -Fhv dhcpd-1.0pl2-4.i386.rpm

5. OpenLinux eServer 2.3.1 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

7d97d64396ab2ac7985cc2f0289850c9 RPMS/dhcp2-2.0-1.i386.rpm
c58d5fa028f934b5d28092cf18e04919 SRPMS/dhcp2-2.0-1.src.rpm

5.3 Installing Fixed Packages

Upgrade the affected packages with the following commands:

rpm -Fhv dhcp2-2.0-1.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

50c2533cc0d2baf90c81a253705dd985 RPMS/dhcp-2.0b1pl29-2.i386.rpm
963b467e66479761810219aaa63688cf SRPMS/dhcp-2.0b1pl29-2.src.rpm

6.3 Installing Fixed Packages

Upgrade the affected packages with the following commands:

rpm -Fhv dhcp-2.0b1pl29-2.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 8668.

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.

9. Acknowledgements

Caldera Systems, Inc. wishes to thank the Team at Immunix, Greg KH at Wirex and Gert Doering for their cooperation.