To: bugtraq@securityfocus.com announce@lists.caldera.com scoannmod@xenitec.on.ca
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Caldera International, Inc. Security Advisory
Subject: Open UNIX, UnixWare 7: timed does not enforce nulls
Advisory number: CSSA-2001-SCO.39
Issue date: 2001 December 10
Cross reference:
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1. Problem Description
The timed program does not enforce null-termination of strings
in certain situations. It is possible that this could be used
by a malicious user to perform a remote denial-of-service
attack.
2. Vulnerable Versions
Operating System Version Affected Files
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UnixWare 7 All /usr/sbin/in.timed
Open UNIX 8.0.0 /usr/sbin/in.timed
3. Workaround
If the in.timed service is not needed, it may be disabled.
4. UnixWare 7, Open UNIX 8
4.1 Location of Fixed Binaries
ftp://stage.caldera.com/pub/security/openunix/CSSA-2001-SCO.39/
4.2 Verification
md5 checksums:
87c68b618f4317dd92460aaa49e6a522 erg711890.Z
md5 is available for download from
ftp://stage.caldera.com/pub/security/tools/
4.3 Installing Fixed Binaries
Upgrade the affected binaries with the following commands:
# uncompress /tmp/erg711890.Z
# pkgadd -d /tmp/erg711890
5. References
http://xforce.iss.net/static/6228.php
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0388
This and other advisories are located at
http://stage.caldera.com/support/security
This advisory addresses Caldera Security internal incidents
sr855196, fz519311, erg711890.
6. Disclaimer
Caldera International, Inc. is not responsible for the misuse
of any of the information we provide on our website and/or
through our security advisories. Our advisories are a service
to our customers intended to promote secure installation and
use of Caldera International products.
7. Acknowledgements
This vulnerability was discovered and researched by David A.
Holland <dholland@www.linux.org.uk>.
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