[NEWS] Blogger.com HTTP Response Splitting Vulnerability

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Blogger.com HTTP Response Splitting Vulnerability
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SUMMARY

" <http://www.blogger.com/> Blogger.com is a bloging system of Google."
Blogger has been found to not filtering characters that can affect the
HTTP headers response, this causes the portal to become vulnerable to HTTP
response splitting XSS.

DETAILS

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 unsensitized 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 poisoning and phishing attacks.

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

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.


ADDITIONAL INFORMATION

The information has been provided by <mailto:meder@xxxxxx> Meder
Kydyraliev.
The original article can be found at:
<http://o0o.nu/~meder/o0o_Blogger_HTTP_response_splitting.txt>
http://o0o.nu/~meder/o0o_Blogger_HTTP_response_splitting.txt



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