bugtraq - Re: Kazaa Sig2Dat Protocol Remote Integer Overflow and Denial Of Service by creating files in arbitrary locations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <1035649796.20050119131143@gmx.net>
Date: Wed, 19 Jan 2005 13:11:43 +0100
From: Markus Kern <markus-kern@....net>
To: "Rafel Ivgi, The-Insider" <theinsider@....net.il>
Cc: "securitytracker.com" <bugs@...uritytracker.com>, vulnwatch@...nwatch.org,
        bugtraq@...urityfocus.com, news@...uriteam.com,
        Windows NTBugtraq Mailing List <NTBUGTRAQ@...TSERV.NTBUGTRAQ.COM>,
        full-disclosure@...ts.netsys.com
Subject: Re: Kazaa Sig2Dat Protocol Remote Integer
	Overflow and Denial Of Service by creating files in arbitrary
	locations



On Tuesday, January 18, 2005, 11:59:51 PM Markus Kern <markus-kern@....net> wrote:

> On Monday, January 17, 2005, 9:40:47 PM Rafel Ivgi, The-Insider <theinsider@....net.il> wrote:

>> Application:   Kazaa
>> Vendors:       http://www.kazaa.com
>> Versions:       kazaa lite k++(probably all others too...)
>> Platforms:      Windows
>> Bug:              Sig2Dat Protocol Remote Integer Overflow and
>>                      Denial Of Service by creating files in arbitrary
>> locations
>> Exploitation:   Remote With Browser
>> Date:             17 Jan 2005
>> Author:          Rafel Ivgi, The-Insider
>> E-Mail:          the_insider@...l.com
>> Website:        http://theinsider.deep-ice.com

<snip toc>

>> Kazaa is currently the worlds most common P2P file sharing application.
>> When installing Kazaa a new protocol is installed named sig2dat.

> This is incorrect. Kazaa itself does not install a handler for the
> 'sig2dat' URIs. In fact it doesn't even know about them. The sig2dat
> URIs are created and handled by a third party tool [1] which contains
> the described flaws and happens to be included in the (unofficial)
> Kazaa Lite package.

I have to correct myself slightly here.

After closer inspection it turns out that more recent versions of
Kazaa Lite include a utility called K-Sig [2] instead of sig2dat.
K-Sig does not share any code with sig2dat. It is not clear which of
the two was used by the original poster but it seems neither of them
do any explicit filtering to prevent directory traversal attacks.

> The official Kazaa from http://www.kazaa.com does not handle sig2dat
> URIs and is not vulnerable.

>> This protocol contain an integer overflow vulnerability which may cause
>> a crash and may allow remote execution of code. There is another
>> vulnerability in the File: parameter which allows creating files in
>> arbitrary locations and committing Denial Of Service.

> [1] sig2dat, http://www.geocities.com/vlaibb/tools.html
>     (The design and code of this thing are horrific and there are no
>     doubt plenty of other bugs to be found)

[2] K-Sig, http://sourceforge.net/projects/hasnain

--
Markus Kern


_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html