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Popper Insecure Temporary File Creation
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SUMMARY
" <http://kpopper.sourceforge.net/> Popper is a very simple, easy-to-use
and functional network messenger." Due to lack of randomness in the names
given to temporary files used by the Popper application local attackers
can gain privileges of other users.
DETAILS
Vulnerable Systems:
* Popper version 1.0 and prior
The vulnerability is caused due to temporary file being created
insecurely. This can be exploited via symbolic-link attacks and in turn to
create and/or overwrite arbitrary files with the privileges of the user
running the affected script.
Code Snips:
popper/popper-send.sh:
#!/bin/sh
echo "$2" > /tmp/.popper-new
echo `date +"%a %l:%m %p"` >> /tmp/.popper-new
cat "$1" >> /tmp/.popper-new
mv -f /tmp/.popper-new /tmp/.popper
The .popper is also used in popper/popper.cpp.
CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1917>
CAN-2005-1917
ADDITIONAL INFORMATION
The information has been provided by <mailto:exploits@zataz.net> ZATAZ
Audits .
The original article can be found at:
<http://www.zataz.net/adviso/kpopper-06152005.txt>
http://www.zataz.net/adviso/kpopper-06152005.txt,
<http://bugs.gentoo.org/show_bug.cgi?id=94475>
http://bugs.gentoo.org/show_bug.cgi?id=94475
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