Home page logo
/

fulldisclosure logo Full Disclosure mailing list archives

Google's Blogger.com classic HTTP response splitting vulnerability
From: Meder Kydyraliev <meder () o0o nu>
Date: Wed, 18 Jan 2006 18:50:48 +0800


        Blogger.com classic HTTP response splitting vulnerability
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

0. Original Advisory
~~~~~~~~~~~~~~~~~~~
http://o0o.nu/~meder/o0o_Blogger_HTTP_response_splitting.txt


I. Background
~~~~~~~~~~~~~

Blogger.com is Google's blogging service.


II. Description
~~~~~~~~~~~~~~~

Blogger's personal page redirection mechanism contains a classic HTTP
response splitting vulnerability in the "Location" HTTP header. The
problem occurs due to use of unsanitized user-supplied data in the
"Location" HTTP header, which enables attacker to inject CRLF(%0d%0a)
characters thus splitting server's response taking full control over
the contents of second HTTP response. Exploitation of the vulnerability
can lead to cross-site scripting (XSS), cache poisioning and phishing
attacks.

The following URL was taking contents of query string and using it in
"Location" HTTP header without proper sanitation:

http://www.blogger.com/r?[URL here]


III. Vendor status 
~~~~~~~~~~~~~~~~~~

Vulnerability has been fixed on 13/01/2006


IV. Disclosure timeline
~~~~~~~~~~~~~~~~~~~~~~~

02/01/2006 - Issue discovered. Vendor notified.
02/01/2006 - Initial vendor response.
12/01/2006 - Vendor inquired on status.
13/01/2006 - Vendor response and confirmation that bug fixed.


V. References
~~~~~~~~~~~~~

1. http://www.packetstormsecurity.org/papers/general/whitepaper_httpresponse.pdf


-- 
http://o0o.nu/~meder
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/


  By Date           By Thread  

Current thread:
  • Google's Blogger.com classic HTTP response splitting vulnerability Meder Kydyraliev (Jan 18)
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]