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Re: store passwords securely in the internet
From: Andre Pawlowski <sqall () h4des org>
Date: Sun, 11 Apr 2010 14:09:30 +0200

I just checked the code if the XSS bug need to be fixed fast (because I
have litte time at the moment).

Even I only check strpos('./') there is no security hole at all. If the
attacker can change the directory and want to write in a system file,
the program decrypts the system file first and check the header of the
decrypted part for an entry of the program itself (with this entry the
program can check the success of the decryption). First of all the
decryption will fail and second the header of the program is not inside
the system file. So the program will abort everything and writes an
error message.

Of course I will add more checks to the program, but I did not see any
vulnerability.

Andre Pawlowski

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Ordnung braucht nur der Dumme, das Genie beherrscht das Chaos.
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On 04/09/2010 05:55 PM, Jan G.B. wrote:
Hi Andre,

2010/4/6 Andre Pawlowski <sqall () h4des org>:
Hi guys,

I've written a program to store your passwords secure in a container on a
server.

The whole project is written in php. A weak point of the program is the http
protocol. When the user doesn't use https to transfer the data the passwords
will send decrypted over the net.

I hope there is any use for this program and I'm glad if anyone of you send
me any critics or suggestions.


Your script does not properly check the input parameters, except that
strpos('./') check.
There are XSS Bugs which can lead to several vulns.
I didn't check it intensely, but I believe your failing strpos()-test
can lead to a directory traversal attack, which may lead to files
being overwritten without permission (for example destroying someone
else's password-safe or crushing systems config files).

Check out this link
 http://narkolayev-shlomi.blogspot.com/2010/04/directory-traversal-fuzz-list.html

Regards

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