Your message dated Sun, 08 Jul 2007 12:42:33 +0200
with message-id <[EMAIL PROTECTED]>
and subject line New version in unstable
has caused the attached Bug report to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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Package: fireflier-server
Version: 1.1.6-3
Severity: grave
Usertags: sourcescan
*** Please type your report below this line ***
Security issue: CVE-2007-2837.
The server, fireflierd, runs with root privileges and the code
contains this gem which I think speaks for itself:
string getRule(unsigned int chainid, int rulenum)
{
...
cmd="rm -f /tmp/fireflier.rules && touch /tmp/fireflier.rules &&
chmod 0700 /tmp/fireflier.rules && ";
cmd+=IPTABLES_SAVE;
cmd+=" > /tmp/fireflier.rules";
if(DEBUG)
cout<<"cmd: "<<cmd<<endl;
system(cmd.c_str());
...
}
This contains several race conditions, and can be trivially exploited to
remove any file on the server as root.
For example run this as a user inside GNU screen:
[EMAIL PROTECTED]:~$ while true; do ln -s /etc/passwd
/tmp/fireflier.rules; done
Wait for a root user to fetch/update/delete a rule using one of the available
clients, and the /etc/passwd file will be removed.
Steve
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--- Begin Message ---
I uploaded fireflier-1.1.7 to unstable, which fixes this bug by applying
the changes from Steve Kemp to fireflier-1.1.6.
In fireflier-1.1.7 no other changes were done.
thanks,
Martin
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