full-disclosure - Re: LeapFTP .lsq Buffer Overflow Vulnerability

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Message-ID: <20050824191313.38440.qmail@web30315.mail.mud.yahoo.com>
Date: Wed Aug 24 20:41:10 2005
From: c0d3rz_team at yahoo.com (Kaveh Razavi)
Subject: Re: LeapFTP .lsq Buffer Overflow Vulnerability

it is not a high risk vulnerability .
chance of making an stable exploit in a unicode
overflow is low .
Regards

c0d3r of IHS
Network Security Reseacher

> LeapFTP .lsq Buffer Overflow Vulnerability
> 
> by Sowhat
> 
> Last Update:2005.08.24
> 
> http://secway.org/advisory/AD20050824.txt
> 
> Vendor:
> 
> LeapWare Inc.
> 
> Product Affected:
> 
> LeapFTP < 2.7.6.612
> 
> Overview:
> 
> LeapFTP is the award-winning shareware FTP client
> that combines an 
> intuitive interface with one of the most powerful
> client bases around. 
> 
> 
> Details:
> 
> .LSQ is the LeapFTP Site Queue file, And it is
> registered with Windows
> by LeapFTP. You can save a transfer Queue to .lsq
> files and transfer it
> later by opening the .lsq files. 
> 
> However, LeapFTP does not properly check the length
> of the "Host" fields,
> when a overly long string is supplied, there will be
> a buffer overflow
> and probably arbitrary code execution.
> 
> This vulnerability can be exploited by sending the
> malformed .lsq file
> to the victim, after the victim open the .lsq file,
> arbitray code may
> executed.
> 
> 
> //bof.lsq
> 
> [HOSTINFO]
> HOST=AAAAA...[ long string ]...AAAAA
> USER=username
> PASS=password
> 
> [FILES]
> "1","/winis/ApiList.zip","477,839","E:\ApiList.zip"
> 
> SOLUTION:
> 
> All users are encouraged to upgrade to 2.7.6
> immediately
> Vendor also released an advisory:
> http://www.leapware.com/security/2005082301.txt
> 
> Vendor Response:
> 
> 2005.08.22 Vendor notified via online WebForm 
> 2005.08.23 Vendor responsed and bug fixed
> 2005.08.24 Vendor released the new version 2.7.6.612
> 2005.08.24 Advisory Released
> 



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