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Peachtree Linux Security Notice PLSN-0005
April 22, 2005
Buffer overflow, memory leaks, and NULL pointer dereference in CVS
CAN-2005-0753, http://www.cvshome.org/
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The following Peachtree Linux releases are affected:
Peachtree Linux release 1 ("Atlanta")
Description:
From the CVS changelog:
Thanks to a report from Alen Zukich <alen.zukich@xxxxxxxxxxxx>, several
minor security issues have been addressed. One was a buffer overflow
that is potentially serious but which may not be exploitable, assigned
CAN-2005-0753 by the Common Vulnerabilities and Exposures Project
<http://www.cve.mitre.org>. Other fixes resulting from Alen's report
include repair of an arbitrary free with no known exploit and several
plugged memory leaks and potentially freed NULL pointers which may have
been exploitable for a denial of service attack.
Thanks to a report from Craig Monson <craig@xxxxxxxxxxxxxxx>, minor
potential vulnerabilities in the contributed Perl scripts have been
fixed. The confirmed vulnerability could allow the execution of
arbitrary code on the CVS server, but only if a user already had commit
access and if one of the contrib scripts was installed improperly, a
condition which should have been quickly visible to any administrator.
The complete description of the problem is here:
<https://ccvs.cvshome.org/issues/show_bug.cgi?id=224>. If you were
making use of any of the contributed trigger scripts on a CVS server,
you should probably still replace them with the new versions, to be on
the safe side.
Unfortunately, our fix is incomplete. Taint-checking has been enabled
in all the contributed Perl scripts intended to be run as trigger
scripts, but no attempt has been made to ensure that they still run in
taint mode. You will most likely have to tweak the scripts in some way
to make them run. Please send any patches you find necessary back to
<bug-cvs@xxxxxxx> so that we may again ship fully enabled scripts in
the future.
You should also make sure that any home-grown Perl scripts that you
might have installed as CVS triggers also have taint-checking enabled.
This can be done by adding `-T' on the scripts' #! lines. Please try
running `perldoc perlsec' if you would like more information on
general Perl security and taint-checking.
Packages:
alpha
177d487f2b06c39b844fa934609bed73 cvs-1.11.20.alpha.dist
i386
007de7131e2eb367b0f88b7f336052ed cvs-1.11.20.i686.dist
ppc
81ebb3159903205c189f808368d20dc5 cvs-1.11.20.ppc.dist
Solution:
Download the appropriate package for your release of Peachtree linux.
Upgrade your system to the new package:
distadd -u packagename
Where package name is the name of the package file from the list above.
After upgrading the cvs package, you'll want to kill and restart any
server processes you have running.
--
Peachtree Linux Security Team
http://peachtree.burdell.org/
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