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>] [day] [month] [year] [list]
Date: Sat, 8 May 2010 20:22:45 +0300
From: "MustLive" <>
To: <>
Subject: Vulnerabilities in Sebo - webstore

Hello Full-Disclosure!

I want to warn you about security vulnerabilities in e-commerce system
Sebo - webstore.

In this advisory I'm continue to inform readers of mailing lists about
vulnerable web applications which are using CaptchaSecurityImages.php. If
you read Bugtraq you can saw the letter, from which it's clearly seen, that
web developers ignore advisory about holes in CaptchaSecurityImages.php
itself, and only draw attention on advisories about their specific web
applications. And I answered on this letter
( So, as I already wrote to
the list, it's only way to draw attention of web developers to these issues.

Advisory: Vulnerabilities in Sebo - webstore
Affected product: Sebo - webstore 0.14 and previous versions.

17.03.2010 - found vulnerabilities.
08.04.2010 - disclosed at my site.
09.04.2010 - informed developers.

These are Insufficient Anti-automation and Denial of Service

The vulnerabilities exist in captcha script CaptchaSecurityImages.php, which
is using in this system. I already reported about vulnerabilities in
CaptchaSecurityImages (

Insufficient Anti-automation:


Captcha bypass is possible as via half-automated or automated (with using of
OCR) methods, which were mentioned before (,
as with using of session reusing with constant captcha bypass method
(, which was described in project Month of
Bugs in Captchas. Last variant of attack is possible due to incorrect
implementation of protection in the system against this captcha bypass



With setting of large values of width and height it's possible to create
large load at the server.

Best wishes & regards,
Administrator of Websecurity web site 

Full-Disclosure - We believe in it.
Hosted and sponsored by Secunia -

Powered by blists - more mailing lists