To: bugtraq@securityfocus.com security-announce@lists.securityportal.com announce@lists.caldera.com scoannmod@xenitec.on.ca
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Caldera International, Inc. Security Advisory
Subject: Open Unix, UnixWare 7: dtsession environment buffer overflow
Advisory number: CSSA-2001-SCO.23
Issue date: 2001 October 1
Cross reference:
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1. Problem Description
Very long environment variables will cause the dtsession
command to overflow a buffer. This could be used by an
unauthorized user to gain privilege.
2. Vulnerable Versions
Operating System Version Affected Files
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UnixWare 7 All /usr/dt/bin/dtsession
Open Unix 8.0.0 /usr/dt/bin/dtsession
3. Workaround
None.
4. UnixWare 7
4.1 Location of Fixed Binaries
ftp://stage.caldera.com/pub/security/openunix/CSSA-2001-SCO.23/
4.2 Verification
md5 checksums:
2883e2ccdb705dcbe7d57420c59c6391 dtsession.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:
# mv /usr/dt/bin/dtsession /usr/dt/bin/dtsession-
# uncompress /tmp/dtsession.Z
# cp dtsession /usr/dt/bin
# cd /usr/dt/bin
# chown root dtsession
# chgrp bin dtsession
# chmod 4555 dtsession
5. References
This and other advisories are located at
http://stage.caldera.com/support/security
This advisory addresses Caldera Security internal incident
sr850738.
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
Caldera International wishes to thank KF <dotslash@snosoft.com>
for discovering and reporting this problem.
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